[Extensions] Add more bindings access checks

chrome/renderer/extensions/media_galleries_custom_bindings.cc

 // Copyright (c) 2012 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 "chrome/renderer/extensions/media_galleries_custom_bindings.h"
 
 #include <string>
 
 #include "extensions/renderer/script_context.h"
 #include "storage/common/fileapi/file_system_util.h"
 #include "third_party/WebKit/public/platform/URLConversion.h"
 #include "third_party/WebKit/public/web/WebDOMFileSystem.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "v8/include/v8.h"
 
 namespace extensions {
 
 MediaGalleriesCustomBindings::MediaGalleriesCustomBindings(
     ScriptContext* context)
     : ObjectBackedNativeHandler(context) {
   RouteFunction(
-      "GetMediaFileSystemObject",
+      "GetMediaFileSystemObject", "mediaGalleries",
       base::Bind(&MediaGalleriesCustomBindings::GetMediaFileSystemObject,
                  base::Unretained(this)));
 }
 
 // FileSystemObject GetMediaFileSystem(string file_system_url): construct
 // a file system object from a file system url.
 void MediaGalleriesCustomBindings::GetMediaFileSystemObject(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   CHECK_EQ(1, args.Length());
   CHECK(args[0]->IsString());
@@ skipping 13 matching lines @@
       storage::GetExternalFileSystemRootURIString(origin, fs_mount));
   args.GetReturnValue().Set(
       blink::WebDOMFileSystem::create(webframe,
                                       blink::WebFileSystemTypeExternal,
                                       blink::WebString::fromUTF8(fs_name),
                                       root_url)
           .toV8Value(context()->v8_context()->Global(), args.GetIsolate()));
 }
 
 }  // namespace extensions