diff -r 000000000000 -r 6474c204b198 dom/xbl/nsXBLPrototypeResources.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/xbl/nsXBLPrototypeResources.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,129 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "nsIStyleRuleProcessor.h"
+#include "nsIDocument.h"
+#include "nsIContent.h"
+#include "nsIServiceManager.h"
+#include "nsXBLResourceLoader.h"
+#include "nsXBLPrototypeResources.h"
+#include "nsXBLPrototypeBinding.h"
+#include "nsIDocumentObserver.h"
+#include "mozilla/css/Loader.h"
+#include "nsIURI.h"
+#include "nsLayoutCID.h"
+#include "nsCSSRuleProcessor.h"
+#include "nsStyleSet.h"
+#include "mozilla/dom/URL.h"
+
+using mozilla::dom::IsChromeURI;
+
+nsXBLPrototypeResources::nsXBLPrototypeResources(nsXBLPrototypeBinding* aBinding)
+{
+  MOZ_COUNT_CTOR(nsXBLPrototypeResources);
+
+  mLoader = new nsXBLResourceLoader(aBinding, this);
+}
+
+nsXBLPrototypeResources::~nsXBLPrototypeResources()
+{
+  MOZ_COUNT_DTOR(nsXBLPrototypeResources);
+  if (mLoader) {
+    mLoader->mResources = nullptr;
+  }
+}
+
+void
+nsXBLPrototypeResources::AddResource(nsIAtom* aResourceType, const nsAString& aSrc)
+{
+  if (mLoader)
+    mLoader->AddResource(aResourceType, aSrc);
+}
+
+void
+nsXBLPrototypeResources::LoadResources(bool* aResult)
+{
+  if (mLoader)
+    mLoader->LoadResources(aResult);
+  else
+    *aResult = true; // All resources loaded.
+}
+
+void
+nsXBLPrototypeResources::AddResourceListener(nsIContent* aBoundElement)
+{
+  if (mLoader)
+    mLoader->AddResourceListener(aBoundElement);
+}
+
+nsresult
+nsXBLPrototypeResources::FlushSkinSheets()
+{
+  if (mStyleSheetList.Length() == 0)
+    return NS_OK;
+
+  nsCOMPtr<nsIDocument> doc =
+    mLoader->mBinding->XBLDocumentInfo()->GetDocument();
+
+  // If doc is null, we're in the process of tearing things down, so just
+  // return without rebuilding anything.
+  if (!doc) {
+    return NS_OK;
+  }
+
+  // We have scoped stylesheets.  Reload any chrome stylesheets we
+  // encounter.  (If they aren't skin sheets, it doesn't matter, since
+  // they'll still be in the chrome cache.
+  mRuleProcessor = nullptr;
+
+  sheet_array_type oldSheets(mStyleSheetList);
+  mStyleSheetList.Clear();
+
+  mozilla::css::Loader* cssLoader = doc->CSSLoader();
+
+  for (sheet_array_type::size_type i = 0, count = oldSheets.Length();
+       i < count; ++i) {
+    nsCSSStyleSheet* oldSheet = oldSheets[i];
+
+    nsIURI* uri = oldSheet->GetSheetURI();
+
+    nsRefPtr<nsCSSStyleSheet> newSheet;
+    if (IsChromeURI(uri)) {
+      if (NS_FAILED(cssLoader->LoadSheetSync(uri, getter_AddRefs(newSheet))))
+        continue;
+    }
+    else {
+      newSheet = oldSheet;
+    }
+
+    mStyleSheetList.AppendElement(newSheet);
+  }
+  mRuleProcessor = new nsCSSRuleProcessor(mStyleSheetList,
+                                          nsStyleSet::eDocSheet,
+                                          nullptr);
+
+  return NS_OK;
+}
+
+nsresult
+nsXBLPrototypeResources::Write(nsIObjectOutputStream* aStream)
+{
+  if (mLoader)
+    return mLoader->Write(aStream);
+  return NS_OK;
+}
+
+void
+nsXBLPrototypeResources::Traverse(nsCycleCollectionTraversalCallback &cb) const
+{
+  NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "proto mResources mLoader");
+  cb.NoteXPCOMChild(mLoader);
+}
+
+void
+nsXBLPrototypeResources::ClearLoader()
+{
+  mLoader = nullptr;
+}