Enable removing uploads to evicted textures from texture upload queues.

cc/CCLayerTreeHost.cpp

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 
 #include "CCLayerTreeHost.h"
 
 #include "CCFontAtlas.h"
 #include "CCGraphicsContext.h"
@@ skipping 387 matching lines @@
     m_proxy->setVisible(visible);
 }
 
 void CCLayerTreeHost::reduceContentsTexturesMemoryOnImplThread(size_t limitBytes, CCResourceProvider* resourceProvider)
 {
     ASSERT(CCProxy::isImplThread());
     ASSERT(m_contentsTextureManager.get());
     m_contentsTextureManager->reduceMemoryOnImplThread(limitBytes, resourceProvider);
 }
 
+bool CCLayerTreeHost::evictedContentsTexturesBackingsExist() const
+{
+    ASSERT(CCProxy::isImplThread());
+    ASSERT(m_contentsTextureManager.get());
+    return m_contentsTextureManager->evictedBackingsExist();
+}
+
 void CCLayerTreeHost::getEvictedContentTexturesBackings(CCPrioritizedTextureManager::BackingVector& evictedBackings)
 {
     ASSERT(CCProxy::isImplThread());
     evictedBackings.clear();
     if (m_rendererInitialized)
         m_contentsTextureManager->getEvictedBackings(evictedBackings);
 }
 
 void CCLayerTreeHost::unlinkEvictedContentTexturesBackings(const CCPrioritizedTextureManager::BackingVector& evictedBackings)
 {
@@ skipping 388 matching lines @@
             else
                 layer->notifyAnimationFinished(wallClockTime);
         }
     }
 
     for (size_t childIndex = 0; childIndex < layer->children().size(); ++childIndex)
         setAnimationEventsRecursive(events, layer->children()[childIndex].get(), wallClockTime);
 }
 
 } // namespace cc