Introduces ImageSkia::GetRepresentations() for Mac

ui/gfx/image/image_skia.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_GFX_IMAGE_IMAGE_SKIA_H_
 #define UI_GFX_IMAGE_IMAGE_SKIA_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 65 matching lines @@
   // Returns true if the object owns an image rep whose density matches
   // |scale_factor| exactly.
   bool HasRepresentation(ui::ScaleFactor scale_factor) const;
 
   // Returns the image rep whose density best matches
   // |scale_factor|.
   // Returns a null image rep if the object contains no image reps.
   const gfx::ImageSkiaRep& GetRepresentation(
       ui::ScaleFactor scale_factor) const;
 
+#if defined(OS_MACOSX)
+  // Returns the image reps contained by this object.
+  // If the image has a source, this method will attempt to generate
+  // representations from the source for all supported scale factors.
+  // Mac only for now.
+  std::vector<ImageSkiaRep> GetRepresentations() const;
+#endif  // OS_MACOSX
+
   // Returns true if object is null or its size is empty.
   bool empty() const;
 
   // Returns true if this is a null object.
   // TODO(pkotwicz): Merge this function into empty().
   bool isNull() const { return storage_ == NULL; }
 
   // Width and height of image in DIP coordinate system.
   int width() const;
   int height() const;
@@ skipping 25 matching lines @@
   // If the image rep's bitmap is empty, ImageStorage is set to NULL.
   void Init(const gfx::ImageSkiaRep& image_rep);
 
   // A refptr so that ImageRepSkia can be copied cheaply.
   scoped_refptr<internal::ImageSkiaStorage> storage_;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_IMAGE_IMAGE_SKIA_H_