Adaptively throttle texture uploads

cc/CCTextureUpdateController.h

Index: cc/CCTextureUpdateController.h
diff --git a/cc/CCTextureUpdateController.h b/cc/CCTextureUpdateController.h
index 61e0f6ce3257333449bbafb313b95ebf22be5116..b634be1c65de25e99af023cab3c23f4fa386df22 100644
--- a/cc/CCTextureUpdateController.h
+++ b/cc/CCTextureUpdateController.h
@@ -49,6 +49,8 @@ public:
 protected:
     CCTextureUpdateController(CCTextureUpdateControllerClient*, CCThread*, PassOwnPtr<CCTextureUpdateQueue>, CCResourceProvider*, TextureCopier*, TextureUploader*);
 
+    static size_t maxFullUpdatesPerTick(TextureUploader*);
+
     // This returns true when there were textures left to update.
     bool updateMoreTexturesIfEnoughTimeRemaining();
     void updateMoreTexturesNow();
@@ -61,6 +63,7 @@ protected:
     TextureCopier* m_copier;
     TextureUploader* m_uploader;
     double m_monotonicTimeLimit;
+    size_t m_textureUpdatesPerTick;
     bool m_firstUpdateAttempt;
 };