Enable removing uploads to evicted textures from texture upload queues.

cc/CCTextureUpdateController.h

 // Copyright 2012 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.
 
 #ifndef CCTextureUpdateController_h
 #define CCTextureUpdateController_h
 
 #include "CCTextureUpdateQueue.h"
 #include "CCTimer.h"
 #include <wtf/Noncopyable.h>
@@ skipping 16 matching lines @@
 public:
     static PassOwnPtr<CCTextureUpdateController> create(CCTextureUpdateControllerClient* client, CCThread* thread, PassOwnPtr<CCTextureUpdateQueue> queue, CCResourceProvider* resourceProvider, TextureUploader* uploader)
     {
         return adoptPtr(new CCTextureUpdateController(client, thread, queue, resourceProvider, uploader));
     }
     static size_t maxPartialTextureUpdates();
     static void updateTextures(CCResourceProvider*, TextureUploader*, CCTextureUpdateQueue*);
 
     virtual ~CCTextureUpdateController();
 
+    // Discard uploads to textures that were evicted on the impl thread.
+    void discardUploadsToEvictedResources();
+
     void performMoreUpdates(double monotonicTimeLimit);
     void finalize();
 
     // CCTimerClient implementation.
     virtual void onTimerFired() OVERRIDE;
 
     // Virtual for testing.
     virtual double monotonicTimeNow() const;
     virtual double updateMoreTexturesTime() const;
     virtual size_t updateMoreTexturesSize() const;
@@ skipping 11 matching lines @@
     bool m_contentsTexturesPurged;
     CCResourceProvider* m_resourceProvider;
     TextureUploader* m_uploader;
     double m_monotonicTimeLimit;
     bool m_firstUpdateAttempt;
 };
 
 }
 
 #endif // CCTextureUpdateController_h