[cc] Add nearest neighbor filtering for PictureLayer.

cc/layers/picture_layer.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 CC_LAYERS_PICTURE_LAYER_H_
 #define CC_LAYERS_PICTURE_LAYER_H_
 
 #include "cc/base/invalidation_region.h"
 #include "cc/debug/devtools_instrumentation.h"
 #include "cc/debug/micro_benchmark_controller.h"
 #include "cc/layers/layer.h"
 #include "cc/trees/occlusion_tracker.h"
 
 namespace cc {
 
 class ContentLayerClient;
 class RecordingSource;
 class ResourceUpdateQueue;
 
 class CC_EXPORT PictureLayer : public Layer {
  public:
   static scoped_refptr<PictureLayer> Create(ContentLayerClient* client);
 
   void ClearClient();
 
+  void SetNearestNeighbor(bool nearest_neighbor);
+
   // Layer interface.
   scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
   void SetLayerTreeHost(LayerTreeHost* host) override;
   void PushPropertiesTo(LayerImpl* layer) override;
   void SetNeedsDisplayRect(const gfx::Rect& layer_rect) override;
   bool Update(ResourceUpdateQueue* queue,
               const OcclusionTracker<Layer>* occlusion) override;
   void SetIsMask(bool is_mask) override;
   bool SupportsLCDText() const override;
   skia::RefPtr<SkPicture> GetPicture() const override;
@@ skipping 26 matching lines @@
       ScopedLayerObjectTracker instrumentation_object_tracker_;
   // Invalidation to use the next time update is called.
   InvalidationRegion pending_invalidation_;
   // Invalidation from the last time update was called.
   Region recording_invalidation_;
   gfx::Rect last_updated_visible_content_rect_;
 
   int update_source_frame_number_;
   bool can_use_lcd_text_for_update_;
   bool is_mask_;
+  bool nearest_neighbor_;
 
   DISALLOW_COPY_AND_ASSIGN(PictureLayer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_PICTURE_LAYER_H_