gfx::Image: Refactor to avoid assuming scoped_ptr lifetime.

ui/gfx/image/image.h

Index: ui/gfx/image/image.h
diff --git a/ui/gfx/image/image.h b/ui/gfx/image/image.h
index 38a5ea9ac2502c95a51b8640fc547587d88207d4..fa7ed1f2695baac29e55a5aaa54535e1749563d9 100644
--- a/ui/gfx/image/image.h
+++ b/ui/gfx/image/image.h
@@ -184,8 +184,10 @@ class GFX_EXPORT Image {
       RepresentationType rep_type, bool must_exist) const;
 
   // Stores a representation into the map. A representation of that type must
-  // not already be in the map.
-  void AddRepresentation(scoped_ptr<internal::ImageRep> rep) const;
+  // not already be in the map. Returns a pointer to the representation stored
+  // inside the map.
+  internal::ImageRep* AddRepresentation(
+      scoped_ptr<internal::ImageRep> rep) const;
 
   // Internal class that holds all the representations. This allows the Image to
   // be cheaply copied.