Get rid of implicit conversion to and from ImageSkiaRep

ui/gfx/image/image_skia.h

Index: ui/gfx/image/image_skia.h
diff --git a/ui/gfx/image/image_skia.h b/ui/gfx/image/image_skia.h
index d872a153c811fd33a2142de6c7fdfd7b2d474b2c..9bcd1b47f4e7d08677c1a41584abbac4b5b4310a 100644
--- a/ui/gfx/image/image_skia.h
+++ b/ui/gfx/image/image_skia.h
@@ -61,17 +61,10 @@ class UI_EXPORT ImageSkia {
   // done.
   ImageSkia& operator=(const SkBitmap& other);
 
-  // Converts from gfx::ImageSkiaRep.
-  // Adds ref to passed in image rep.
-  // TODO(pkotwicz): This is temporary till conversion to gfx::ImageSkia is
-  // done.
-  ImageSkia& operator=(const gfx::ImageSkiaRep& other);
-
   // Converts to gfx::ImageSkiaRep and SkBitmap.
   // TODO(pkotwicz): This is temporary till conversion to gfx::ImageSkia is
   // done.
   operator SkBitmap&() const;
-  operator gfx::ImageSkiaRep&() const;
 
   ~ImageSkia();