Add support for multi resolution icons

ui/base/resource/resource_bundle_mac.mm

 // Copyright (c) 2011 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.
 
 #include "ui/base/resource/resource_bundle.h"
 
 #import <AppKit/AppKit.h>
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
@@ skipping 28 matching lines @@
 }
 
 }  // namespace
 
 // static
 FilePath ResourceBundle::GetResourcesFilePath() {
   return GetResourcesPakFilePath(@"chrome", nil);
 }
 
 // static
+FilePath ResourceBundle::GetLargeIconResourcesFilePath() {
+  return GetResourcesPakFilePath(@"theme_resources_large", nil);
+}
+
+// static
 FilePath ResourceBundle::GetLocaleFilePath(const std::string& app_locale) {
   NSString* mac_locale = base::SysUTF8ToNSString(app_locale);
 
   // Mac OS X uses "_" instead of "-", so swap to get a Mac-style value.
   mac_locale = [mac_locale stringByReplacingOccurrencesOfString:@"-"
                                                      withString:@"_"];
 
   // On disk, the "en_US" resources are just "en" (http://crbug.com/25578).
   if ([mac_locale isEqual:@"en_US"])
     mac_locale = @"en";
@@ skipping 23 matching lines @@
 
   // Create a data object from the raw bytes.
   scoped_nsobject<NSData> ns_data([[NSData alloc] initWithBytes:data->front()
                                                          length:data->size()]);
 
   // Create the image from the data. The gfx::Image will take ownership of this.
   scoped_nsobject<NSImage> ns_image([[NSImage alloc] initWithData:ns_data]);
 
   // Cache the converted image.
   if (ns_image.get()) {
+    // Load a high resolution version of the icon if available.
+    if (large_icon_resources_data_) {
+      scoped_refptr<RefCountedStaticMemory> large_data(
+          LoadResourceBytes(large_icon_resources_data_, resource_id));
+      if (large_data.get()) {
+        scoped_nsobject<NSData> ns_large_data(
+            [[NSData alloc] initWithBytes:large_data->front()
+                                   length:large_data->size()]);
+        NSImageRep* image_rep =
+            [NSBitmapImageRep imageRepWithData:ns_large_data];
+        if (image_rep)
+          [ns_image addRepresentation:image_rep];
+      }
+    }
+
     base::AutoLock lock(*lock_);
 
     // Another thread raced the load and has already cached the image.
     if (images_.count(resource_id)) {
       return *images_[resource_id];
     }
 
     gfx::Image* image = new gfx::Image(ns_image.release());
     images_[resource_id] = image;
     return *image;
   }
 
   LOG(WARNING) << "Unable to load image with id " << resource_id;
   NOTREACHED();  // Want to assert in debug mode.
   return *GetEmptyImage();
 }
 
 }  // namespace ui