Add new ResourceBundle::Delegate interface.

ui/base/resource/resource_bundle_mac.mm

Index: ui/base/resource/resource_bundle_mac.mm
===================================================================
--- ui/base/resource/resource_bundle_mac.mm	(revision 133962)
+++ ui/base/resource/resource_bundle_mac.mm	(working copy)
@@ -44,17 +44,22 @@
 }  // namespace
 
 void ResourceBundle::LoadCommonResources() {
-  AddDataPack(GetResourcesPakFilePath(@"chrome", nil));
-  AddDataPack(GetResourcesPakFilePath(@"theme_resources_standard", nil));
-  AddDataPack(GetResourcesPakFilePath(@"ui_resources_standard", nil));
+  AddCommonDataPack("chrome", GetResourcesPakFilePath(@"chrome", nil));
+  AddCommonDataPack("theme_resources_standard",
+      GetResourcesPakFilePath(@"theme_resources_standard", nil));
+  AddCommonDataPack("ui_resources_standard",
+      GetResourcesPakFilePath(@"ui_resources_standard", nil));
 
   // On Windows and ChromeOS we load either the 1x resource or the 2x resource.
   // On Mac we load both and let the UI framework decide which one to use.
 #if defined(ENABLE_HIDPI)
   if (base::mac::IsOSLionOrLater()) {
-    AddDataPack(GetResourcesPakFilePath(@"theme_resources_2x", nil));
-    AddDataPack(GetResourcesPakFilePath(@"theme_resources_standard_2x", nil));
-    AddDataPack(GetResourcesPakFilePath(@"ui_resources_standard_2x", nil));
+    AddCommonDataPack("theme_resources_2x",
+        GetResourcesPakFilePath(@"theme_resources_2x", nil));
+    AddCommonDataPack("theme_resources_standard_2x",
+        GetResourcesPakFilePath(@"theme_resources_standard_2x", nil));
+    AddCommonDataPack("ui_resources_standard_2x",
+        GetResourcesPakFilePath(@"ui_resources_standard_2x", nil));
   }
 #endif
 }
@@ -71,7 +76,14 @@
   if ([mac_locale isEqual:@"en_US"])
     mac_locale = @"en";
 
-  return GetResourcesPakFilePath(@"locale", mac_locale);
+  FilePath locale_file_path = GetResourcesPakFilePath(@"locale", mac_locale);
+
+  if (delegate_ &&
+      !delegate_->GetPathForLocalePack(app_locale, &locale_file_path)) {
+    return FilePath();
+  }
+
+  return locale_file_path;
 }
 
 gfx::Image& ResourceBundle::GetNativeImageNamed(int resource_id, ImageRTL rtl) {
@@ -93,39 +105,47 @@
     }
   }
 
-  scoped_nsobject<NSImage> ns_image;
-  for (size_t i = 0; i < data_packs_.size(); ++i) {
-    scoped_refptr<base::RefCountedStaticMemory> data(
-        data_packs_[i]->GetStaticMemory(resource_id));
-    if (!data.get())
-      continue;
+  gfx::Image* image = NULL;
+  if (delegate_)
+    image = delegate_->GetNativeImageNamed(resource_id, rtl);
 
-    scoped_nsobject<NSData> ns_data(
-        [[NSData alloc] initWithBytes:data->front()
-                               length:data->size()]);
+  if (!image) {
+    scoped_nsobject<NSImage> ns_image;
+    for (size_t i = 0; i < data_packs_.size(); ++i) {
+      scoped_refptr<base::RefCountedStaticMemory> data(
+          data_packs_[i]->GetStaticMemory(resource_id));
+      if (!data.get())
+        continue;
+
+      scoped_nsobject<NSData> ns_data(
+          [[NSData alloc] initWithBytes:data->front()
+                                 length:data->size()]);
+      if (!ns_image.get()) {
+        ns_image.reset([[NSImage alloc] initWithData:ns_data]);
+      } else {
+        NSImageRep* image_rep = [NSBitmapImageRep imageRepWithData:ns_data];
+        if (image_rep)
+          [ns_image addRepresentation:image_rep];
+      }
+    }
+
     if (!ns_image.get()) {
-      ns_image.reset([[NSImage alloc] initWithData:ns_data]);
-    } else {
-      NSImageRep* image_rep = [NSBitmapImageRep imageRepWithData:ns_data];
-      if (image_rep)
-        [ns_image addRepresentation:image_rep];
+      LOG(WARNING) << "Unable to load image with id " << resource_id;
+      NOTREACHED();  // Want to assert in debug mode.
+      return *GetEmptyImage();
     }
-  }
 
-  if (!ns_image.get()) {
-    LOG(WARNING) << "Unable to load image with id " << resource_id;
-    NOTREACHED();  // Want to assert in debug mode.
-    return *GetEmptyImage();
+    image = new gfx::Image(ns_image.release());
   }
 
   base::AutoLock lock(*images_and_fonts_lock_);
 
   // Another thread raced the load and has already cached the image.
   if (images_.count(resource_id)) {
+    delete image;
     return *images_[resource_id];
   }
 
-  gfx::Image* image = new gfx::Image(ns_image.release());
   images_[resource_id] = image;
   return *image;
 }