Make ResourceFetcher::m_documentResources use WeakPtr

third_party/WebKit/Source/core/page/Page.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All Rights Reserved.
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 496 matching lines @@
         if (frame->isLocalFrame())
             frames.append(toLocalFrame(frame));
     }
 
     for (unsigned i = 0; i < frames.size(); ++i)
         frames[i]->localDOMWindow()->acceptLanguagesChanged();
 }
 
 void Page::purgeMemory(DeviceKind deviceKind)
 {
-    Frame* frame = mainFrame();
-    if (deviceKind != DeviceKind::LowEnd || !frame || !frame->isLocalFrame())
-        return;
-    if (Document* document = toLocalFrame(frame)->document())
-        document->fetcher()->garbageCollectDocumentResources();
-    memoryCache()->pruneAll();
+    if (deviceKind == DeviceKind::LowEnd)
+        memoryCache()->pruneAll();
 }
 
 DEFINE_TRACE(Page)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_animator);
     visitor->trace(m_autoscrollController);
     visitor->trace(m_chromeClient);
     visitor->trace(m_dragCaretController);
     visitor->trace(m_dragController);
@@ skipping 59 matching lines @@
 {
 }
 
 Page::PageClients::~PageClients()
 {
 }
 
 template class CORE_TEMPLATE_EXPORT WillBeHeapSupplement<Page>;
 
 } // namespace blink