Allow eviction of ImageBitmaps that are created from ImageElements.

Source/core/loader/cache/CachedResource.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 101 matching lines @@
     , m_cancelTimer(this, &CachedResource::cancelTimerFired)
     , m_lastDecodedAccessTime(0)
     , m_loadFinishTime(0)
     , m_identifier(0)
     , m_encodedSize(0)
     , m_decodedSize(0)
     , m_accessCount(0)
     , m_handleCount(0)
     , m_preloadCount(0)
     , m_preloadResult(PreloadNotReferenced)
+    , m_decodePriority(DecodePriorityLow)
     , m_inLiveDecodedResourcesList(false)
     , m_requestedFromNetworkingLayer(false)
     , m_inCache(false)
     , m_loading(false)
     , m_switchingClientsToRevalidatedResource(false)
     , m_type(type)
     , m_status(Pending)
 #ifndef NDEBUG
     , m_deleted(false)
     , m_lruIndex(0)
@@ skipping 216 matching lines @@
     ResourceHandle::cacheMetadata(m_response, m_cachedMetadata->serialize());
 }
 
 CachedMetadata* CachedResource::cachedMetadata(unsigned dataTypeID) const
 {
     if (!m_cachedMetadata || m_cachedMetadata->dataTypeID() != dataTypeID)
         return 0;
     return m_cachedMetadata.get();
 }
 
+void CachedResource::setDecodePriority(DecodePriority priority)
+{
+    m_lastDecodedAccessTime = currentTime();
+    if (inCache()) {
+        if (m_inLiveDecodedResourcesList && m_decodePriority != priority) {
+            memoryCache()->removeFromLiveDecodedResourcesList(this);
+            m_decodePriority = priority;
+            memoryCache()->insertInLiveDecodedResourcesList(this);
+        }
+        memoryCache()->prune();
+    }
+}
+
 void CachedResource::clearLoader()
 {
     m_loader = 0;
 }
 
 void CachedResource::addClient(CachedResourceClient* client)
 {
     if (addClientToSet(client))
         didAddClient(client);
 }
@@ skipping 176 matching lines @@
         memoryCache()->insertInLRUList(this);
         
         // Update the cache's size totals.
         memoryCache()->adjustSize(hasClients(), delta);
     }
 }
 
 void CachedResource::didAccessDecodedData(double timeStamp)
 {
     m_lastDecodedAccessTime = timeStamp;
-    

[Justin Novosad, 2013/07/23 16:55:12]

Don't do whitespace edits unless you are changing the immediately surrounding
code.

     if (inCache()) {
         if (m_inLiveDecodedResourcesList) {
             memoryCache()->removeFromLiveDecodedResourcesList(this);
             memoryCache()->insertInLiveDecodedResourcesList(this);
         }
         memoryCache()->prune();
     }
 }
     
 void CachedResource::setResourceToRevalidate(CachedResource* resource) 
@@ skipping 309 matching lines @@
     info.addMember(m_proxyResource, "proxyResource");
     info.addMember(m_handlesToRevalidate, "handlesToRevalidate");
     info.addMember(m_options, "options");
     info.addMember(m_decodedDataDeletionTimer, "decodedDataDeletionTimer");
     info.ignoreMember(m_clientsAwaitingCallback);
 
     if (m_purgeableData && !m_purgeableData->wasPurged())
         info.addRawBuffer(m_purgeableData.get(), m_purgeableData->size(), "PurgeableData", "purgeableData");
 }
 }
+