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..261be66e8d7f5cf5e1903a4c7d41e96478d2b958 100644
--- a/cc/playback/display_list_raster_source.h
+++ b/cc/playback/display_list_raster_source.h
@@ -22,15 +22,6 @@ class DrawImage;
 class CC_EXPORT DisplayListRasterSource
     : public base::RefCountedThreadSafe<DisplayListRasterSource> {
  public:
-  struct CC_EXPORT SolidColorAnalysis {
-    SolidColorAnalysis()
-        : is_solid_color(false), solid_color(SK_ColorTRANSPARENT) {}
-    ~SolidColorAnalysis() {}
-
-    bool is_solid_color;
-    SkColor solid_color;
-  };
-
   static scoped_refptr<DisplayListRasterSource>
   CreateFromDisplayListRecordingSource(const DisplayListRecordingSource* other,
                                        bool can_use_lcd_text);
@@ -56,9 +47,9 @@ 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;