Add support for multiple icon sizes for Mac platform apps

chrome/browser/ui/views/aura/app_list/extension_app_item.cc

Index: chrome/browser/ui/views/aura/app_list/extension_app_item.cc
diff --git a/chrome/browser/ui/views/aura/app_list/extension_app_item.cc b/chrome/browser/ui/views/aura/app_list/extension_app_item.cc
index 3abb60a0b6a569e6af003641b1407900f08f3c8f..63e5418e8f328ab321ff7fc6453dd0352e7320ba 100644
--- a/chrome/browser/ui/views/aura/app_list/extension_app_item.cc
+++ b/chrome/browser/ui/views/aura/app_list/extension_app_item.cc
@@ -136,11 +136,11 @@ void ExtensionAppItem::LoadDefaultImage() {
   SetIcon(*rb.GetImageNamed(resource).ToSkBitmap());
 }
 
-void ExtensionAppItem::OnImageLoaded(SkBitmap* image,
-                                     const ExtensionResource& resource,
+void ExtensionAppItem::OnImageLoaded(const gfx::Image& image,
+                                     const std::string& extension_id,
                                      int tracker_index) {
-  if (image && !image->empty())
-    SetIcon(*image);
+  if (!image.IsEmpty())
+    SetIcon(*image.ToSkBitmap());
   else
     LoadDefaultImage();
 }