1 files changed, 51 insertions, 0 deletions
diff --git a/docshell/base/timeline/AutoRestyleTimelineMarker.cpp b/docshell/base/timeline/AutoRestyleTimelineMarker.cpp
new file mode 100644
index 0000000000..d9992bc33f
--- /dev/null
+++ b/docshell/base/timeline/AutoRestyleTimelineMarker.cpp
@@ -0,0 +1,51 @@
+/* -*- 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 "AutoRestyleTimelineMarker.h"
+
+#include "TimelineConsumers.h"
+#include "MainThreadUtils.h"
+#include "nsIDocShell.h"
+#include "RestyleTimelineMarker.h"
+
+namespace mozilla {
+
+AutoRestyleTimelineMarker::AutoRestyleTimelineMarker(nsIDocShell* aDocShell,
+                                                     bool aIsAnimationOnly)
+    : mDocShell(nullptr), mIsAnimationOnly(aIsAnimationOnly) {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  if (!aDocShell) {
+    return;
+  }
+
+  if (!TimelineConsumers::HasConsumer(aDocShell)) {
+    return;
+  }
+
+  mDocShell = aDocShell;
+  TimelineConsumers::AddMarkerForDocShell(
+      mDocShell, MakeUnique<RestyleTimelineMarker>(mIsAnimationOnly,
+                                                   MarkerTracingType::START));
+}
+
+AutoRestyleTimelineMarker::~AutoRestyleTimelineMarker() {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  if (!mDocShell) {
+    return;
+  }
+
+  if (!TimelineConsumers::HasConsumer(mDocShell)) {
+    return;
+  }
+
+  TimelineConsumers::AddMarkerForDocShell(
+      mDocShell, MakeUnique<RestyleTimelineMarker>(mIsAnimationOnly,
+                                                   MarkerTracingType::END));
+}
+
+}  // namespace mozilla