[4/5] Add translated rasterization support for PictureLayerTilingSet & below

cc/playback/raster_source.h

Index: cc/playback/raster_source.h
diff --git a/cc/playback/raster_source.h b/cc/playback/raster_source.h
index 52aa5ef748248216bcbc043cdd4980a0a922093b..ceee070dc1af4fa582fba3cc871713282d8e359e 100644
--- a/cc/playback/raster_source.h
+++ b/cc/playback/raster_source.h
@@ -78,7 +78,7 @@ class CC_EXPORT RasterSource : public base::RefCountedThreadSafe<RasterSource> {
   // Returns whether the given rect at given scale is of solid color in
   // this raster source, as well as the solid color value.
   bool PerformSolidColorAnalysis(const gfx::Rect& content_rect,
-                                 const gfx::SizeF& raster_scales,
+                                 float raster_scale,
                                  SkColor* color) const;
 
   // Returns true iff the whole raster source is of solid color.
@@ -103,7 +103,7 @@ class CC_EXPORT RasterSource : public base::RefCountedThreadSafe<RasterSource> {
   // rect in layer space. The returned draw images' matrices are modified as if
   // they were being using during raster at scale |raster_scale|.
   void GetDiscardableImagesInRect(const gfx::Rect& layer_rect,
-                                  const gfx::SizeF& raster_scales,
+                                  float raster_scale,
                                   std::vector<DrawImage>* images) const;
 
   // Return true iff this raster source can raster the given rect in layer