cc: Do solid color analysis before scheduling tiles.

cc/playback/display_list_raster_source.h

Index: cc/playback/display_list_raster_source.h
diff --git a/cc/playback/display_list_raster_source.h b/cc/playback/display_list_raster_source.h
index 8c06c8d68637dc5175b18bf8d93ee57ace1a8bc9..28aa4702b6007a1889bfba19ac023d16be21aecb 100644
--- a/cc/playback/display_list_raster_source.h
+++ b/cc/playback/display_list_raster_source.h
@@ -56,9 +56,9 @@ class CC_EXPORT DisplayListRasterSource
 
   // Analyze to determine if the given rect at given scale is of solid color in
   // this raster source.
-  void PerformSolidColorAnalysis(const gfx::Rect& content_rect,
+  bool PerformSolidColorAnalysis(const gfx::Rect& content_rect,
                                  float contents_scale,
-                                 SolidColorAnalysis* analysis) const;
+                                 SkColor* color) const;
 
   // Returns true iff the whole raster source is of solid color.
   bool IsSolidColor() const;