cc: Do solid color analysis before scheduling tiles.

cc/playback/display_list_raster_source.h

 // Copyright 2014 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_PLAYBACK_DISPLAY_LIST_RASTER_SOURCE_H_
 #define CC_PLAYBACK_DISPLAY_LIST_RASTER_SOURCE_H_
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 88 matching lines @@
   virtual void DidBeginTracing();
   virtual void AsValueInto(base::trace_event::TracedValue* array) const;
   virtual skia::RefPtr<SkPicture> GetFlattenedPicture();
   virtual size_t GetPictureMemoryUsage() const;
 
   // Return true if LCD anti-aliasing may be used when rastering text.
   virtual bool CanUseLCDText() const;
 
   scoped_refptr<DisplayListRasterSource> CreateCloneWithoutLCDText() const;
 
+  bool IsSolidColorTile(gfx::Rect content_rect, float scale, SkColor* color);
+
  protected:
   friend class base::RefCountedThreadSafe<DisplayListRasterSource>;
 
   DisplayListRasterSource(const DisplayListRecordingSource* other,
                           bool can_use_lcd_text);
   DisplayListRasterSource(const DisplayListRasterSource* other,
                           bool can_use_lcd_text);
   virtual ~DisplayListRasterSource();
 
   // These members are const as this raster source may be in use on another
@@ skipping 30 matching lines @@
                                   const gfx::Rect& canvas_bitmap_rect,
                                   const gfx::Rect& canvas_playback_rect,
                                   float contents_scale) const;
 
   DISALLOW_COPY_AND_ASSIGN(DisplayListRasterSource);
 };
 
 }  // namespace cc
 
 #endif  // CC_PLAYBACK_DISPLAY_LIST_RASTER_SOURCE_H_