cc: Compute picture pile size at construction time.

cc/resources/picture_pile_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_RESOURCES_PICTURE_PILE_IMPL_H_
 #define CC_RESOURCES_PICTURE_PILE_IMPL_H_
 
 #include <map>
 #include <set>
 #include <vector>
@@ skipping 106 matching lines @@
   const SkColor solid_color_;
   const gfx::Rect recorded_viewport_;
   const bool has_any_recordings_;
   const bool clear_canvas_with_debug_color_;
   const float min_contents_scale_;
   const int slow_down_raster_scale_factor_for_debug_;
   // TODO(enne/vmiura): this has a read/write race between raster and compositor
   // threads with multi-threaded Ganesh.  Make this const or remove it.
   bool should_attempt_to_use_distance_field_text_;
 
+  size_t picture_memory_usage_;
+
  private:
   typedef std::map<const Picture*, Region> PictureRegionMap;
 
   // Called when analyzing a tile. We can use AnalysisCanvas as
   // SkDrawPictureCallback, which allows us to early out from analysis.
   void RasterForAnalysis(skia::AnalysisCanvas* canvas,
                          const gfx::Rect& canvas_rect,
                          float contents_scale) const;
 
   void CoalesceRasters(const gfx::Rect& canvas_rect,
@@ skipping 11 matching lines @@
   bool CanRasterSlowTileCheck(const gfx::Rect& layer_rect) const;
 
   gfx::Rect PaddedRect(const PictureMapKey& key) const;
 
   DISALLOW_COPY_AND_ASSIGN(PicturePileImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_PICTURE_PILE_IMPL_H_