1 files changed, 679 insertions, 0 deletions
diff --git a/dom/performance/PerformanceTiming.cpp b/dom/performance/PerformanceTiming.cpp
new file mode 100644
index 0000000000..ea1205f89f
--- /dev/null
+++ b/dom/performance/PerformanceTiming.cpp
@@ -0,0 +1,679 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "PerformanceTiming.h"
+#include "mozilla/BasePrincipal.h"
+#include "mozilla/dom/PerformanceTimingBinding.h"
+#include "mozilla/StaticPrefs_dom.h"
+#include "mozilla/Telemetry.h"
+#include "nsIDocShell.h"
+#include "nsIDocShellTreeItem.h"
+#include "nsIHttpChannel.h"
+#include "mozilla/dom/BrowsingContext.h"
+#include "mozilla/dom/Document.h"
+#include "nsITimedChannel.h"
+
+namespace mozilla::dom {
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(PerformanceTiming, mPerformance)
+
+/* static */
+PerformanceTimingData* PerformanceTimingData::Create(
+    nsITimedChannel* aTimedChannel, nsIHttpChannel* aChannel,
+    DOMHighResTimeStamp aZeroTime, nsAString& aInitiatorType,
+    nsAString& aEntryName) {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  // Check if resource timing is prefed off.
+  if (!StaticPrefs::dom_enable_resource_timing()) {
+    return nullptr;
+  }
+
+  if (!aChannel || !aTimedChannel) {
+    return nullptr;
+  }
+
+  bool reportTiming = true;
+  aTimedChannel->GetReportResourceTiming(&reportTiming);
+
+  if (!reportTiming) {
+    return nullptr;
+  }
+
+  aTimedChannel->GetInitiatorType(aInitiatorType);
+
+  // If the initiator type had no valid value, then set it to the default
+  // ("other") value.
+  if (aInitiatorType.IsEmpty()) {
+    aInitiatorType = u"other"_ns;
+  }
+
+  // According to the spec, "The name attribute must return the resolved URL
+  // of the requested resource. This attribute must not change even if the
+  // fetch redirected to a different URL."
+  nsCOMPtr<nsIURI> originalURI;
+  aChannel->GetOriginalURI(getter_AddRefs(originalURI));
+
+  nsAutoCString name;
+  originalURI->GetSpec(name);
+  CopyUTF8toUTF16(name, aEntryName);
+
+  // The nsITimedChannel argument will be used to gather all the timings.
+  // The nsIHttpChannel argument will be used to check if any cross-origin
+  // redirects occurred.
+  // The last argument is the "zero time" (offset). Since we don't want
+  // any offset for the resource timing, this will be set to "0" - the
+  // resource timing returns a relative timing (no offset).
+  return new PerformanceTimingData(aTimedChannel, aChannel, 0);
+}
+
+PerformanceTiming::PerformanceTiming(Performance* aPerformance,
+                                     nsITimedChannel* aChannel,
+                                     nsIHttpChannel* aHttpChannel,
+                                     DOMHighResTimeStamp aZeroTime)
+    : mPerformance(aPerformance) {
+  MOZ_ASSERT(aPerformance, "Parent performance object should be provided");
+
+  mTimingData.reset(new PerformanceTimingData(
+      aChannel, aHttpChannel,
+      nsRFPService::ReduceTimePrecisionAsMSecs(
+          aZeroTime, aPerformance->GetRandomTimelineSeed(),
+          aPerformance->GetRTPCallerType())));
+
+  // Non-null aHttpChannel implies that this PerformanceTiming object is being
+  // used for subresources, which is irrelevant to this probe.
+  if (!aHttpChannel && StaticPrefs::dom_enable_performance() &&
+      IsTopLevelContentDocument()) {
+    Telemetry::Accumulate(Telemetry::TIME_TO_RESPONSE_START_MS,
+                          mTimingData->ResponseStartHighRes(aPerformance) -
+                              mTimingData->ZeroTime());
+  }
+}
+
+// Copy the timing info from the channel so we don't need to keep the channel
+// alive just to get the timestamps.
+PerformanceTimingData::PerformanceTimingData(nsITimedChannel* aChannel,
+                                             nsIHttpChannel* aHttpChannel,
+                                             DOMHighResTimeStamp aZeroTime)
+    : mZeroTime(0.0),
+      mFetchStart(0.0),
+      mEncodedBodySize(0),
+      mTransferSize(0),
+      mDecodedBodySize(0),
+      mRedirectCount(0),
+      mAllRedirectsSameOrigin(true),
+      mAllRedirectsPassTAO(true),
+      mSecureConnection(false),
+      mTimingAllowed(true),
+      mInitialized(false) {
+  mInitialized = !!aChannel;
+  mZeroTime = aZeroTime;
+
+  if (!StaticPrefs::dom_enable_performance() ||
+      nsContentUtils::ShouldResistFingerprinting()) {
+    mZeroTime = 0;
+  }
+
+  nsCOMPtr<nsIURI> uri;
+  if (aHttpChannel) {
+    aHttpChannel->GetURI(getter_AddRefs(uri));
+  } else {
+    nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aChannel);
+    if (httpChannel) {
+      httpChannel->GetURI(getter_AddRefs(uri));
+    }
+  }
+
+  if (uri) {
+    mSecureConnection = uri->SchemeIs("https");
+  }
+
+  if (aChannel) {
+    aChannel->GetAsyncOpen(&mAsyncOpen);
+    aChannel->GetAllRedirectsSameOrigin(&mAllRedirectsSameOrigin);
+    aChannel->GetAllRedirectsPassTimingAllowCheck(&mAllRedirectsPassTAO);
+    aChannel->GetRedirectCount(&mRedirectCount);
+    aChannel->GetRedirectStart(&mRedirectStart);
+    aChannel->GetRedirectEnd(&mRedirectEnd);
+    aChannel->GetDomainLookupStart(&mDomainLookupStart);
+    aChannel->GetDomainLookupEnd(&mDomainLookupEnd);
+    aChannel->GetConnectStart(&mConnectStart);
+    aChannel->GetSecureConnectionStart(&mSecureConnectionStart);
+    aChannel->GetConnectEnd(&mConnectEnd);
+    aChannel->GetRequestStart(&mRequestStart);
+    aChannel->GetResponseStart(&mResponseStart);
+    aChannel->GetCacheReadStart(&mCacheReadStart);
+    aChannel->GetResponseEnd(&mResponseEnd);
+    aChannel->GetCacheReadEnd(&mCacheReadEnd);
+
+    aChannel->GetDispatchFetchEventStart(&mWorkerStart);
+    aChannel->GetHandleFetchEventStart(&mWorkerRequestStart);
+    // TODO: Track when FetchEvent.respondWith() promise resolves as
+    //       ServiceWorker interception responseStart?
+    aChannel->GetHandleFetchEventEnd(&mWorkerResponseEnd);
+
+    // The performance timing api essentially requires that the event timestamps
+    // have a strict relation with each other. The truth, however, is the
+    // browser engages in a number of speculative activities that sometimes mean
+    // connections and lookups begin at different times. Workaround that here by
+    // clamping these values to what we expect FetchStart to be.  This means the
+    // later of AsyncOpen or WorkerStart times.
+    if (!mAsyncOpen.IsNull()) {
+      // We want to clamp to the expected FetchStart value.  This is later of
+      // the AsyncOpen and WorkerStart values.
+      const TimeStamp* clampTime = &mAsyncOpen;
+      if (!mWorkerStart.IsNull() && mWorkerStart > mAsyncOpen) {
+        clampTime = &mWorkerStart;
+      }
+
+      if (!mDomainLookupStart.IsNull() && mDomainLookupStart < *clampTime) {
+        mDomainLookupStart = *clampTime;
+      }
+
+      if (!mDomainLookupEnd.IsNull() && mDomainLookupEnd < *clampTime) {
+        mDomainLookupEnd = *clampTime;
+      }
+
+      if (!mConnectStart.IsNull() && mConnectStart < *clampTime) {
+        mConnectStart = *clampTime;
+      }
+
+      if (mSecureConnection && !mSecureConnectionStart.IsNull() &&
+          mSecureConnectionStart < *clampTime) {
+        mSecureConnectionStart = *clampTime;
+      }
+
+      if (!mConnectEnd.IsNull() && mConnectEnd < *clampTime) {
+        mConnectEnd = *clampTime;
+      }
+    }
+  }
+
+  // The aHttpChannel argument is null if this PerformanceTiming object is
+  // being used for navigation timing (which is only relevant for documents).
+  // It has a non-null value if this PerformanceTiming object is being used
+  // for resource timing, which can include document loads, both toplevel and
+  // in subframes, and resources linked from a document.
+  if (aHttpChannel) {
+    SetPropertiesFromHttpChannel(aHttpChannel, aChannel);
+  }
+}
+
+PerformanceTimingData::PerformanceTimingData(
+    const IPCPerformanceTimingData& aIPCData)
+    : mNextHopProtocol(aIPCData.nextHopProtocol()),
+      mAsyncOpen(aIPCData.asyncOpen()),
+      mRedirectStart(aIPCData.redirectStart()),
+      mRedirectEnd(aIPCData.redirectEnd()),
+      mDomainLookupStart(aIPCData.domainLookupStart()),
+      mDomainLookupEnd(aIPCData.domainLookupEnd()),
+      mConnectStart(aIPCData.connectStart()),
+      mSecureConnectionStart(aIPCData.secureConnectionStart()),
+      mConnectEnd(aIPCData.connectEnd()),
+      mRequestStart(aIPCData.requestStart()),
+      mResponseStart(aIPCData.responseStart()),
+      mCacheReadStart(aIPCData.cacheReadStart()),
+      mResponseEnd(aIPCData.responseEnd()),
+      mCacheReadEnd(aIPCData.cacheReadEnd()),
+      mWorkerStart(aIPCData.workerStart()),
+      mWorkerRequestStart(aIPCData.workerRequestStart()),
+      mWorkerResponseEnd(aIPCData.workerResponseEnd()),
+      mZeroTime(aIPCData.zeroTime()),
+      mFetchStart(aIPCData.fetchStart()),
+      mEncodedBodySize(aIPCData.encodedBodySize()),
+      mTransferSize(aIPCData.transferSize()),
+      mDecodedBodySize(aIPCData.decodedBodySize()),
+      mRedirectCount(aIPCData.redirectCount()),
+      mAllRedirectsSameOrigin(aIPCData.allRedirectsSameOrigin()),
+      mAllRedirectsPassTAO(aIPCData.allRedirectsPassTAO()),
+      mSecureConnection(aIPCData.secureConnection()),
+      mTimingAllowed(aIPCData.timingAllowed()),
+      mInitialized(aIPCData.initialized()) {
+  for (const auto& serverTimingData : aIPCData.serverTiming()) {
+    RefPtr<nsServerTiming> timing = new nsServerTiming();
+    timing->SetName(serverTimingData.name());
+    timing->SetDuration(serverTimingData.duration());
+    timing->SetDescription(serverTimingData.description());
+    mServerTiming.AppendElement(timing);
+  }
+}
+
+IPCPerformanceTimingData PerformanceTimingData::ToIPC() {
+  nsTArray<IPCServerTiming> ipcServerTiming;
+  for (auto& serverTimingData : mServerTiming) {
+    nsAutoCString name;
+    Unused << serverTimingData->GetName(name);
+    double duration = 0;
+    Unused << serverTimingData->GetDuration(&duration);
+    nsAutoCString description;
+    Unused << serverTimingData->GetDescription(description);
+    ipcServerTiming.AppendElement(IPCServerTiming(name, duration, description));
+  }
+  return IPCPerformanceTimingData(
+      ipcServerTiming, mNextHopProtocol, mAsyncOpen, mRedirectStart,
+      mRedirectEnd, mDomainLookupStart, mDomainLookupEnd, mConnectStart,
+      mSecureConnectionStart, mConnectEnd, mRequestStart, mResponseStart,
+      mCacheReadStart, mResponseEnd, mCacheReadEnd, mWorkerStart,
+      mWorkerRequestStart, mWorkerResponseEnd, mZeroTime, mFetchStart,
+      mEncodedBodySize, mTransferSize, mDecodedBodySize, mRedirectCount,
+      mAllRedirectsSameOrigin, mAllRedirectsPassTAO, mSecureConnection,
+      mTimingAllowed, mInitialized);
+}
+
+void PerformanceTimingData::SetPropertiesFromHttpChannel(
+    nsIHttpChannel* aHttpChannel, nsITimedChannel* aChannel) {
+  MOZ_ASSERT(aHttpChannel);
+
+  nsAutoCString protocol;
+  Unused << aHttpChannel->GetProtocolVersion(protocol);
+  CopyUTF8toUTF16(protocol, mNextHopProtocol);
+
+  Unused << aHttpChannel->GetEncodedBodySize(&mEncodedBodySize);
+  Unused << aHttpChannel->GetTransferSize(&mTransferSize);
+  Unused << aHttpChannel->GetDecodedBodySize(&mDecodedBodySize);
+  if (mDecodedBodySize == 0) {
+    mDecodedBodySize = mEncodedBodySize;
+  }
+
+  mTimingAllowed = CheckAllowedOrigin(aHttpChannel, aChannel);
+  aChannel->GetAllRedirectsPassTimingAllowCheck(&mAllRedirectsPassTAO);
+
+  aChannel->GetNativeServerTiming(mServerTiming);
+}
+
+PerformanceTiming::~PerformanceTiming() = default;
+
+DOMHighResTimeStamp PerformanceTimingData::FetchStartHighRes(
+    Performance* aPerformance) {
+  MOZ_ASSERT(aPerformance);
+
+  if (!mFetchStart) {
+    if (!StaticPrefs::dom_enable_performance() || !IsInitialized()) {
+      return mZeroTime;
+    }
+    MOZ_ASSERT(!mAsyncOpen.IsNull(),
+               "The fetch start time stamp should always be "
+               "valid if the performance timing is enabled");
+    if (!mAsyncOpen.IsNull()) {
+      if (!mWorkerRequestStart.IsNull() && mWorkerRequestStart > mAsyncOpen) {
+        mFetchStart = TimeStampToDOMHighRes(aPerformance, mWorkerRequestStart);
+      } else {
+        mFetchStart = TimeStampToDOMHighRes(aPerformance, mAsyncOpen);
+      }
+    }
+  }
+  return nsRFPService::ReduceTimePrecisionAsMSecs(
+      mFetchStart, aPerformance->GetRandomTimelineSeed(),
+      aPerformance->GetRTPCallerType());
+}
+
+DOMTimeMilliSec PerformanceTiming::FetchStart() {
+  return static_cast<int64_t>(mTimingData->FetchStartHighRes(mPerformance));
+}
+
+bool PerformanceTimingData::CheckAllowedOrigin(nsIHttpChannel* aResourceChannel,
+                                               nsITimedChannel* aChannel) {
+  if (!IsInitialized()) {
+    return false;
+  }
+
+  // Check that the current document passes the ckeck.
+  nsCOMPtr<nsILoadInfo> loadInfo = aResourceChannel->LoadInfo();
+
+  // TYPE_DOCUMENT loads have no loadingPrincipal.
+  if (loadInfo->GetExternalContentPolicyType() ==
+      ExtContentPolicy::TYPE_DOCUMENT) {
+    return true;
+  }
+
+  nsCOMPtr<nsIPrincipal> principal = loadInfo->GetLoadingPrincipal();
+
+  // Check if the resource is either same origin as the page that started
+  // the load, or if the response contains the proper Timing-Allow-Origin
+  // header with the domain of the page that started the load.
+  return aChannel->TimingAllowCheck(principal);
+}
+
+uint8_t PerformanceTimingData::GetRedirectCount() const {
+  if (!StaticPrefs::dom_enable_performance() || !IsInitialized() ||
+      nsContentUtils::ShouldResistFingerprinting()) {
+    return 0;
+  }
+  if (!mAllRedirectsSameOrigin) {
+    return 0;
+  }
+  return mRedirectCount;
+}
+
+bool PerformanceTimingData::ShouldReportCrossOriginRedirect(
+    bool aEnsureSameOriginAndIgnoreTAO) const {
+  if (!StaticPrefs::dom_enable_performance() || !IsInitialized() ||
+      nsContentUtils::ShouldResistFingerprinting()) {
+    return false;
+  }
+
+  if (!mTimingAllowed || mRedirectCount == 0) {
+    return false;
+  }
+
+  // If the redirect count is 0, or if one of the cross-origin
+  // redirects doesn't have the proper Timing-Allow-Origin header,
+  // then RedirectStart and RedirectEnd will be set to zero
+  return aEnsureSameOriginAndIgnoreTAO ? mAllRedirectsSameOrigin
+                                       : mAllRedirectsPassTAO;
+}
+
+DOMHighResTimeStamp PerformanceTimingData::AsyncOpenHighRes(
+    Performance* aPerformance) {
+  MOZ_ASSERT(aPerformance);
+
+  if (!StaticPrefs::dom_enable_performance() || !IsInitialized() ||
+      mAsyncOpen.IsNull()) {
+    return mZeroTime;
+  }
+  DOMHighResTimeStamp rawValue =
+      TimeStampToDOMHighRes(aPerformance, mAsyncOpen);
+  return nsRFPService::ReduceTimePrecisionAsMSecs(
+      rawValue, aPerformance->GetRandomTimelineSeed(),
+      aPerformance->GetRTPCallerType());
+}
+
+DOMHighResTimeStamp PerformanceTimingData::WorkerStartHighRes(
+    Performance* aPerformance) {
+  MOZ_ASSERT(aPerformance);
+
+  if (!StaticPrefs::dom_enable_performance() || !IsInitialized() ||
+      mWorkerStart.IsNull()) {
+    return mZeroTime;
+  }
+  DOMHighResTimeStamp rawValue =
+      TimeStampToDOMHighRes(aPerformance, mWorkerStart);
+  return nsRFPService::ReduceTimePrecisionAsMSecs(
+      rawValue, aPerformance->GetRandomTimelineSeed(),
+      aPerformance->GetRTPCallerType());
+}
+
+/**
+ * RedirectStartHighRes() is used by both the navigation timing and the
+ * resource timing. Since, navigation timing and resource timing check and
+ * interpret cross-domain redirects in a different manner,
+ * RedirectStartHighRes() will make no checks for cross-domain redirect.
+ * It's up to the consumers of this method (PerformanceTiming::RedirectStart()
+ * and PerformanceResourceTiming::RedirectStart() to make such verifications.
+ *
+ * @return a valid timing if the Performance Timing is enabled
+ */
+DOMHighResTimeStamp PerformanceTimingData::RedirectStartHighRes(
+    Performance* aPerformance) {
+  MOZ_ASSERT(aPerformance);
+
+  if (!StaticPrefs::dom_enable_performance() || !IsInitialized()) {
+    return mZeroTime;
+  }
+  return TimeStampToReducedDOMHighResOrFetchStart(aPerformance, mRedirectStart);
+}
+
+DOMTimeMilliSec PerformanceTiming::RedirectStart() {
+  if (!mTimingData->IsInitialized()) {
+    return 0;
+  }
+  // We have to check if all the redirect URIs had the same origin (since there
+  // is no check in RedirectStartHighRes())
+  if (mTimingData->AllRedirectsSameOrigin() &&
+      mTimingData->RedirectCountReal()) {
+    return static_cast<int64_t>(
+        mTimingData->RedirectStartHighRes(mPerformance));
+  }
+  return 0;
+}
+
+/**
+ * RedirectEndHighRes() is used by both the navigation timing and the resource
+ * timing. Since, navigation timing and resource timing check and interpret
+ * cross-domain redirects in a different manner, RedirectEndHighRes() will make
+ * no checks for cross-domain redirect. It's up to the consumers of this method
+ * (PerformanceTiming::RedirectEnd() and
+ * PerformanceResourceTiming::RedirectEnd() to make such verifications.
+ *
+ * @return a valid timing if the Performance Timing is enabled
+ */
+DOMHighResTimeStamp PerformanceTimingData::RedirectEndHighRes(
+    Performance* aPerformance) {
+  MOZ_ASSERT(aPerformance);
+
+  if (!StaticPrefs::dom_enable_performance() || !IsInitialized()) {
+    return mZeroTime;
+  }
+  return TimeStampToReducedDOMHighResOrFetchStart(aPerformance, mRedirectEnd);
+}
+
+DOMTimeMilliSec PerformanceTiming::RedirectEnd() {
+  if (!mTimingData->IsInitialized()) {
+    return 0;
+  }
+  // We have to check if all the redirect URIs had the same origin (since there
+  // is no check in RedirectEndHighRes())
+  if (mTimingData->AllRedirectsSameOrigin() &&
+      mTimingData->RedirectCountReal()) {
+    return static_cast<int64_t>(mTimingData->RedirectEndHighRes(mPerformance));
+  }
+  return 0;
+}
+
+DOMHighResTimeStamp PerformanceTimingData::DomainLookupStartHighRes(
+    Performance* aPerformance) {
+  MOZ_ASSERT(aPerformance);
+
+  if (!StaticPrefs::dom_enable_performance() || !IsInitialized()) {
+    return mZeroTime;
+  }
+  // Bug 1637985 - DomainLookup information may be useful for fingerprinting.
+  if (nsContentUtils::ShouldResistFingerprinting()) {
+    return FetchStartHighRes(aPerformance);
+  }
+  return TimeStampToReducedDOMHighResOrFetchStart(aPerformance,
+                                                  mDomainLookupStart);
+}
+
+DOMTimeMilliSec PerformanceTiming::DomainLookupStart() {
+  return static_cast<int64_t>(
+      mTimingData->DomainLookupStartHighRes(mPerformance));
+}
+
+DOMHighResTimeStamp PerformanceTimingData::DomainLookupEndHighRes(
+    Performance* aPerformance) {
+  MOZ_ASSERT(aPerformance);
+
+  if (!StaticPrefs::dom_enable_performance() || !IsInitialized()) {
+    return mZeroTime;
+  }
+  // Bug 1637985 - DomainLookup information may be useful for fingerprinting.
+  if (nsContentUtils::ShouldResistFingerprinting()) {
+    return FetchStartHighRes(aPerformance);
+  }
+  // Bug 1155008 - nsHttpTransaction is racy. Return DomainLookupStart when null
+  if (mDomainLookupEnd.IsNull()) {
+    return DomainLookupStartHighRes(aPerformance);
+  }
+  DOMHighResTimeStamp rawValue =
+      TimeStampToDOMHighRes(aPerformance, mDomainLookupEnd);
+  return nsRFPService::ReduceTimePrecisionAsMSecs(
+      rawValue, aPerformance->GetRandomTimelineSeed(),
+      aPerformance->GetRTPCallerType());
+}
+
+DOMTimeMilliSec PerformanceTiming::DomainLookupEnd() {
+  return static_cast<int64_t>(
+      mTimingData->DomainLookupEndHighRes(mPerformance));
+}
+
+DOMHighResTimeStamp PerformanceTimingData::ConnectStartHighRes(
+    Performance* aPerformance) {
+  MOZ_ASSERT(aPerformance);
+
+  if (!StaticPrefs::dom_enable_performance() || !IsInitialized()) {
+    return mZeroTime;
+  }
+  if (mConnectStart.IsNull()) {
+    return DomainLookupEndHighRes(aPerformance);
+  }
+  DOMHighResTimeStamp rawValue =
+      TimeStampToDOMHighRes(aPerformance, mConnectStart);
+  return nsRFPService::ReduceTimePrecisionAsMSecs(
+      rawValue, aPerformance->GetRandomTimelineSeed(),
+      aPerformance->GetRTPCallerType());
+}
+
+DOMTimeMilliSec PerformanceTiming::ConnectStart() {
+  return static_cast<int64_t>(mTimingData->ConnectStartHighRes(mPerformance));
+}
+
+DOMHighResTimeStamp PerformanceTimingData::SecureConnectionStartHighRes(
+    Performance* aPerformance) {
+  MOZ_ASSERT(aPerformance);
+
+  if (!StaticPrefs::dom_enable_performance() || !IsInitialized()) {
+    return mZeroTime;
+  }
+  if (!mSecureConnection) {
+    return 0;  // We use 0 here, because mZeroTime is sometimes set to the
+               // navigation start time.
+  }
+  if (mSecureConnectionStart.IsNull()) {
+    return ConnectStartHighRes(aPerformance);
+  }
+  DOMHighResTimeStamp rawValue =
+      TimeStampToDOMHighRes(aPerformance, mSecureConnectionStart);
+  return nsRFPService::ReduceTimePrecisionAsMSecs(
+      rawValue, aPerformance->GetRandomTimelineSeed(),
+      aPerformance->GetRTPCallerType());
+}
+
+DOMTimeMilliSec PerformanceTiming::SecureConnectionStart() {
+  return static_cast<int64_t>(
+      mTimingData->SecureConnectionStartHighRes(mPerformance));
+}
+
+DOMHighResTimeStamp PerformanceTimingData::ConnectEndHighRes(
+    Performance* aPerformance) {
+  MOZ_ASSERT(aPerformance);
+
+  if (!StaticPrefs::dom_enable_performance() || !IsInitialized()) {
+    return mZeroTime;
+  }
+  // Bug 1155008 - nsHttpTransaction is racy. Return ConnectStart when null
+  if (mConnectEnd.IsNull()) {
+    return ConnectStartHighRes(aPerformance);
+  }
+  DOMHighResTimeStamp rawValue =
+      TimeStampToDOMHighRes(aPerformance, mConnectEnd);
+  return nsRFPService::ReduceTimePrecisionAsMSecs(
+      rawValue, aPerformance->GetRandomTimelineSeed(),
+      aPerformance->GetRTPCallerType());
+}
+
+DOMTimeMilliSec PerformanceTiming::ConnectEnd() {
+  return static_cast<int64_t>(mTimingData->ConnectEndHighRes(mPerformance));
+}
+
+DOMHighResTimeStamp PerformanceTimingData::RequestStartHighRes(
+    Performance* aPerformance) {
+  MOZ_ASSERT(aPerformance);
+
+  if (!StaticPrefs::dom_enable_performance() || !IsInitialized()) {
+    return mZeroTime;
+  }
+
+  if (mRequestStart.IsNull()) {
+    mRequestStart = mWorkerRequestStart;
+  }
+
+  return TimeStampToReducedDOMHighResOrFetchStart(aPerformance, mRequestStart);
+}
+
+DOMTimeMilliSec PerformanceTiming::RequestStart() {
+  return static_cast<int64_t>(mTimingData->RequestStartHighRes(mPerformance));
+}
+
+DOMHighResTimeStamp PerformanceTimingData::ResponseStartHighRes(
+    Performance* aPerformance) {
+  MOZ_ASSERT(aPerformance);
+
+  if (!StaticPrefs::dom_enable_performance() || !IsInitialized()) {
+    return mZeroTime;
+  }
+  if (mResponseStart.IsNull() ||
+      (!mCacheReadStart.IsNull() && mCacheReadStart < mResponseStart)) {
+    mResponseStart = mCacheReadStart;
+  }
+
+  if (mResponseStart.IsNull() ||
+      (!mRequestStart.IsNull() && mResponseStart < mRequestStart)) {
+    mResponseStart = mRequestStart;
+  }
+  return TimeStampToReducedDOMHighResOrFetchStart(aPerformance, mResponseStart);
+}
+
+DOMTimeMilliSec PerformanceTiming::ResponseStart() {
+  return static_cast<int64_t>(mTimingData->ResponseStartHighRes(mPerformance));
+}
+
+DOMHighResTimeStamp PerformanceTimingData::ResponseEndHighRes(
+    Performance* aPerformance) {
+  MOZ_ASSERT(aPerformance);
+
+  if (!StaticPrefs::dom_enable_performance() || !IsInitialized()) {
+    return mZeroTime;
+  }
+  if (mResponseEnd.IsNull() ||
+      (!mCacheReadEnd.IsNull() && mCacheReadEnd < mResponseEnd)) {
+    mResponseEnd = mCacheReadEnd;
+  }
+  if (mResponseEnd.IsNull()) {
+    mResponseEnd = mWorkerResponseEnd;
+  }
+  // Bug 1155008 - nsHttpTransaction is racy. Return ResponseStart when null
+  if (mResponseEnd.IsNull()) {
+    return ResponseStartHighRes(aPerformance);
+  }
+  DOMHighResTimeStamp rawValue =
+      TimeStampToDOMHighRes(aPerformance, mResponseEnd);
+  return nsRFPService::ReduceTimePrecisionAsMSecs(
+      rawValue, aPerformance->GetRandomTimelineSeed(),
+      aPerformance->GetRTPCallerType());
+}
+
+DOMTimeMilliSec PerformanceTiming::ResponseEnd() {
+  return static_cast<int64_t>(mTimingData->ResponseEndHighRes(mPerformance));
+}
+
+JSObject* PerformanceTiming::WrapObject(JSContext* cx,
+                                        JS::Handle<JSObject*> aGivenProto) {
+  return PerformanceTiming_Binding::Wrap(cx, this, aGivenProto);
+}
+
+bool PerformanceTiming::IsTopLevelContentDocument() const {
+  nsCOMPtr<Document> document = mPerformance->GetDocumentIfCurrent();
+  if (!document) {
+    return false;
+  }
+
+  if (BrowsingContext* bc = document->GetBrowsingContext()) {
+    return bc->IsTopContent();
+  }
+  return false;
+}
+
+nsTArray<nsCOMPtr<nsIServerTiming>> PerformanceTimingData::GetServerTiming() {
+  if (!StaticPrefs::dom_enable_performance() || !IsInitialized() ||
+      !TimingAllowed()) {
+    return nsTArray<nsCOMPtr<nsIServerTiming>>();
+  }
+
+  return mServerTiming.Clone();
+}
+
+}  // namespace mozilla::dom