cc: Add image decode control in the compositor.

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..9c5f23f6265f205ce4ac0bc4c507d21545bb7cda 100644
--- a/cc/playback/display_list_raster_source.h
+++ b/cc/playback/display_list_raster_source.h
@@ -18,6 +18,7 @@
 namespace cc {
 class DisplayItemList;
 class DrawImage;
+class ImageDecodeController;
 
 class CC_EXPORT DisplayListRasterSource
     : public base::RefCountedThreadSafe<DisplayListRasterSource> {
@@ -106,6 +107,8 @@ class CC_EXPORT DisplayListRasterSource
 
   scoped_refptr<DisplayListRasterSource> CreateCloneWithoutLCDText() const;
 
+  void SetImageDecodeController(ImageDecodeController* image_decode_controller);

[enne (OOO), 2015/10/29 22:59:45]

I think it would be worth commenting about lifetime issues here, in that this
needs to be preserved past the raster source's lifetime.  Also maybe worth
hoisting the comment that this can only be set once to the header.

+
  protected:
   friend class base::RefCountedThreadSafe<DisplayListRasterSource>;
 
@@ -132,6 +135,8 @@ class CC_EXPORT DisplayListRasterSource
   // threads with multi-threaded Ganesh.  Make this const or remove it.
   bool should_attempt_to_use_distance_field_text_;
 
+  ImageDecodeController* image_decode_controller_;
+
  private:
   // Called when analyzing a tile. We can use AnalysisCanvas as
   // SkPicture::AbortCallback, which allows us to early out from analysis.