DO NOT COMMIT: Experimental removal of encoded image data

third_party/WebKit/Source/core/fetch/Resource.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
 
     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
@@ skipping 800 matching lines @@
 
     // Prevent the case when there are clients waiting but no callback scheduled.
     ASSERT(m_clientsAwaitingCallback.isEmpty() || scheduled);
 }
 
 void Resource::prune()
 {
     destroyDecodedDataIfPossible();
 }
 
+bool Resource::isReloadable() const
+{
+    ResourceClientWalker<ResourceClient> w(m_finishedClients);
+    while (ResourceClient* c = w.next()) {
+        if (!c->isReloadable())
+            return false;
+    }
+    return true;
+}
+
 void Resource::prepareToSuspend()
 {
     prune();
     if (!m_cacheHandler)
         return;
     m_cacheHandler->clearCachedMetadata(CachedMetadataHandler::CacheLocally);
 }
 
 void Resource::onMemoryDump(WebMemoryDumpLevelOfDetail levelOfDetail, WebProcessMemoryDump* memoryDump) const
 {
@@ skipping 234 matching lines @@
     case Resource::TextTrack:
     case Resource::Media:
     case Resource::Manifest:
         return false;
     }
     ASSERT_NOT_REACHED();
     return false;
 }
 
 } // namespace blink