cc: Move gpu rasterization flag from LayerImpl to LayerTreeImpl.

cc/layers/picture_layer_impl.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_IMPL_H_
 #define CC_LAYERS_PICTURE_LAYER_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 113 matching lines @@
   void SyncTiling(const PictureLayerTiling* tiling);
 
   // Mask-related functions
   void SetIsMask(bool is_mask);
   virtual ResourceProvider::ResourceId ContentsResourceId() const OVERRIDE;
 
   virtual size_t GPUMemoryUsageInBytes() const OVERRIDE;
 
   virtual void RunMicroBenchmark(MicroBenchmarkImpl* benchmark) OVERRIDE;
 
-  void SetUseGpuRasterization(bool use_gpu);
-  bool ShouldUseGpuRasterization() const { return use_gpu_rasterization_; }
+  bool UseGpuRasterization() const;

[reveman, 2014/05/08 21:51:30]

should we just get rid of this completely and use
layer_tree_impl()->use_gpu_rasterization() directly? I think that makes it more
clear that it's a tree specific setting and never different between layers.

[alokp, 2014/05/08 22:44:41]

I will prefer to keep this convenience function for now. It is used at multiple
places, some of which will go away once we can switch out the rasterizer.

[reveman, 2014/05/08 23:08:33]

Ok in that case, could it be inlined and named use_gpu_rasterization?

[alokp, 2014/05/08 23:34:43]

Done.

 
   // Functions used by tile manager.
   void DidUnregisterLayer();
   PictureLayerImpl* GetTwinLayer() { return twin_layer_; }
   WhichTree GetTree() const;
   bool IsOnActiveOrPendingTree() const;
 
  protected:
   friend class LayerRasterTileIterator;
 
   PictureLayerImpl(LayerTreeImpl* tree_impl, int id);
   PictureLayerTiling* AddTiling(float contents_scale);
   void RemoveTiling(float contents_scale);
   void RemoveAllTilings();
   void SyncFromActiveLayer(const PictureLayerImpl* other);
   void ManageTilings(bool animating_transform_to_screen,
                      float maximum_animation_contents_scale);
   bool ShouldHaveLowResTiling() const {
-    return should_use_low_res_tiling_ && !ShouldUseGpuRasterization();
+    return should_use_low_res_tiling_ && !UseGpuRasterization();
   }
   virtual bool ShouldAdjustRasterScale(
       bool animating_transform_to_screen) const;
   virtual void RecalculateRasterScales(bool animating_transform_to_screen,
                                        float maximum_animation_contents_scale);
   void CleanUpTilingsOnActiveLayer(
       std::vector<PictureLayerTiling*> used_tilings);
   float MinimumContentsScale() const;
   float SnappedContentsScale(float new_contents_scale);
   void UpdateLCDTextStatus(bool new_status);
@@ skipping 40 matching lines @@
   float low_res_raster_contents_scale_;
 
   bool raster_source_scale_is_fixed_;
   bool was_animating_transform_to_screen_;
   bool is_using_lcd_text_;
   bool needs_post_commit_initialization_;
   // A sanity state check to make sure UpdateTilePriorities only gets called
   // after a CalculateContentsScale/ManageTilings.
   bool should_update_tile_priorities_;
   bool should_use_low_res_tiling_;
-  bool use_gpu_rasterization_;
 
   bool layer_needs_to_register_itself_;
 
   // Save a copy of the visible rect and viewport size of the last frame that
   // has a valid viewport for prioritizing tiles.
   gfx::Rect visible_rect_for_tile_priority_;
   gfx::Size viewport_size_for_tile_priority_;
   gfx::Transform screen_space_transform_for_tile_priority_;
 
   friend class PictureLayer;
   DISALLOW_COPY_AND_ASSIGN(PictureLayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_PICTURE_LAYER_IMPL_H_