Introduces ImageSkia::GetRepresentations() for Mac

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 e6ab0acdd599ea224d3b9df9c9a5697014b54b27..fbe3414256ebb9ef0e78f276404754d3e6d56525 100644
--- a/ui/gfx/image/image_skia.h
+++ b/ui/gfx/image/image_skia.h
@@ -83,6 +83,14 @@ class UI_EXPORT ImageSkia {
   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;