Add support for multi resolution icons

ui/base/resource/resource_bundle.h

Index: ui/base/resource/resource_bundle.h
diff --git a/ui/base/resource/resource_bundle.h b/ui/base/resource/resource_bundle.h
index d9731032d1484bcc1f88f84214ca50f5aeb3e2d1..9d1127755b91f7ef5f8cb71a962d9d89df3313c9 100644
--- a/ui/base/resource/resource_bundle.h
+++ b/ui/base/resource/resource_bundle.h
@@ -105,11 +105,16 @@ class ResourceBundle {
   //
   // !! THIS IS DEPRECATED. PLEASE USE THE METHOD BELOW. !!
   SkBitmap* GetBitmapNamed(int resource_id);
+  bool GetBitmapsNamed(int resource_id, std::vector<SkBitmap*>& bitmaps);
 
   // Gets an image resource from the current module data. This will load the
   // image in Skia format by default. The ResourceBundle owns this.
   gfx::Image& GetImageNamed(int resource_id);
 
+  // Gets images for the given |resource_id|. This can be used for icons
+  // rendered at multiple resolutions.
+  bool GetImagesNamed(int resource_id, std::vector<gfx::Image*>& images);
+
   // Similar to GetImageNamed, but rather than loading the image in Skia format,
   // it will load in the native platform type. This can avoid conversion from
   // one image type to another. ResourceBundle owns the result.
@@ -228,6 +233,10 @@ class ResourceBundle {
   // Initialize all the gfx::Font members if they haven't yet been initialized.
   void LoadFontsIfNecessary();
 
+  // Gets images from the cache.
+  bool GetImagesFromCacheNamed(int resource_id,
+                               std::vector<gfx::Image*>& images);
+
 #if defined(USE_BASE_DATA_PACK)
   // Returns the full pathname of the main resources file to load.  May return
   // an empty string if no main resources data files are found.
@@ -245,10 +254,10 @@ class ResourceBundle {
   static RefCountedStaticMemory* LoadResourceBytes(DataHandle module,
                                                    int resource_id);
 
-  // Creates and returns a new SkBitmap given the data file to look in and the
-  // resource id.  It's up to the caller to free the returned bitmap when
-  // done.
-  static SkBitmap* LoadBitmap(DataHandle dll_inst, int resource_id);
+  // Creates and returns SkBitmaps given the data file to look in and the
+  // resource id.
+  static bool LoadBitmaps(DataHandle dll_inst, int resource_id,
+                          std::vector<SkBitmap>& bitmaps);
 
   // Returns an empty image for when a resource cannot be loaded. This is a
   // bright red bitmap.
@@ -267,7 +276,7 @@ class ResourceBundle {
 
   // Cached images. The ResourceBundle caches all retrieved images and keeps
   // ownership of the pointers.
-  typedef std::map<int, gfx::Image*> ImageMap;
+  typedef std::map<int, std::vector<gfx::Image*>* > ImageMap;
   ImageMap images_;
 
   // The various fonts used. Cached to avoid repeated GDI creation/destruction.