cc: Add a blocksPendingCommit flag to LayerImpl

cc/tiled_layer.h

 // 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.
 
 #ifndef CC_TILED_LAYER_H_
 #define CC_TILED_LAYER_H_
 
 #include "cc/cc_export.h"
 #include "cc/contents_scaling_layer.h"
 #include "cc/layer_tiling_data.h"
 #include "cc/layer_updater.h"
 
 namespace cc {
 class UpdatableTile;
 
 class CC_EXPORT TiledLayer : public ContentsScalingLayer {
 public:
     enum TilingOption { AlwaysTile, NeverTile, AutoTile };
 
     virtual void setIsMask(bool) OVERRIDE;
 
     virtual void pushPropertiesTo(LayerImpl*) OVERRIDE;
 
+    virtual bool blocksPendingCommit() const OVERRIDE;
+
     virtual bool drawsContent() const OVERRIDE;
 
     virtual void setNeedsDisplayRect(const gfx::RectF&) OVERRIDE;
 
     virtual void setLayerTreeHost(LayerTreeHost*) OVERRIDE;
 
     virtual void setTexturePriorities(const PriorityCalculator&) OVERRIDE;
 
     virtual Region visibleContentOpaqueRegion() const OVERRIDE;
 
@@ skipping 61 matching lines @@
     gfx::Rect m_predictedVisibleRect;
     gfx::Rect m_previousVisibleRect;
     gfx::Size m_previousContentBounds;
 
     TilingOption m_tilingOption;
     scoped_ptr<LayerTilingData> m_tiler;
 };
 
 }
 #endif  // CC_TILED_LAYER_H_