1 files changed, 52 insertions, 0 deletions
diff --git a/layout/style/URLExtraData.cpp b/layout/style/URLExtraData.cpp
new file mode 100644
index 0000000000..730576cad3
--- /dev/null
+++ b/layout/style/URLExtraData.cpp
@@ -0,0 +1,52 @@
+/* -*- 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/. */
+
+/* thread-safe container of information for resolving url values */
+
+#include "mozilla/URLExtraData.h"
+
+#include "mozilla/NullPrincipal.h"
+#include "nsAboutProtocolUtils.h"
+#include "ReferrerInfo.h"
+
+namespace mozilla {
+
+StaticRefPtr<URLExtraData> URLExtraData::sDummy;
+StaticRefPtr<URLExtraData> URLExtraData::sDummyChrome;
+
+/* static */
+void URLExtraData::Init() {
+  RefPtr<nsIURI> baseURI = NullPrincipal::CreateURI();
+  nsCOMPtr<nsIReferrerInfo> referrerInfo = new dom::ReferrerInfo(nullptr);
+  sDummy = new URLExtraData(do_AddRef(baseURI), do_AddRef(referrerInfo),
+                            NullPrincipal::CreateWithoutOriginAttributes());
+
+  sDummyChrome =
+      new URLExtraData(baseURI.forget(), referrerInfo.forget(),
+                       NullPrincipal::CreateWithoutOriginAttributes());
+  sDummyChrome->mChromeRulesEnabled = true;
+}
+
+bool URLExtraData::ChromeRulesEnabled(nsIURI* aURI) {
+  if (!aURI) {
+    return false;
+  }
+  return aURI->SchemeIs("chrome") || aURI->SchemeIs("resource") ||
+         (aURI->SchemeIs("about") && !NS_IsContentAccessibleAboutURI(aURI));
+}
+
+/* static */
+void URLExtraData::Shutdown() {
+  sDummy = nullptr;
+  sDummyChrome = nullptr;
+}
+
+URLExtraData::~URLExtraData() = default;
+
+StaticRefPtr<URLExtraData>
+    URLExtraData::sShared[size_t(UserAgentStyleSheetID::Count)];
+
+}  // namespace mozilla