Convert ui::MenuModel to use gfx::Image instead of ImageSkia.

ui/base/models/menu_model.h

Index: ui/base/models/menu_model.h
diff --git a/ui/base/models/menu_model.h b/ui/base/models/menu_model.h
index a684253ba83adaffdd6a84f61b3f44736078c4bc..bad38a76216e75b6096c9cd293610d1e9ca5b3c7 100644
--- a/ui/base/models/menu_model.h
+++ b/ui/base/models/menu_model.h
@@ -14,7 +14,7 @@
 
 namespace gfx {
 class Font;
-class ImageSkia;
+class Image;
 }
 
 namespace ui {
@@ -87,7 +87,7 @@ class UI_EXPORT MenuModel {
 
   // Gets the icon for the item at the specified index, returning true if there
   // is an icon, false otherwise.
-  virtual bool GetIconAt(int index, gfx::ImageSkia* icon) = 0;
+  virtual bool GetIconAt(int index, gfx::Image* icon) = 0;
 
   // Returns the model for a menu item with a line of buttons at |index|.
   virtual ButtonMenuItemModel* GetButtonMenuItemAt(int index) const = 0;