use the userAgent() in the same loadable module as RendererWebKitPlatformSupportImpl

content/renderer/renderer_webkitplatformsupport_impl.h

 // 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.
 
 #ifndef CONTENT_RENDERER_RENDERER_WEBKITPLATFORMSUPPORT_IMPL_H_
 #define CONTENT_RENDERER_RENDERER_WEBKITPLATFORMSUPPORT_IMPL_H_
 #pragma once
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 69 matching lines @@
   virtual WebKit::WebSharedWorkerRepository* sharedWorkerRepository();
   virtual WebKit::WebGraphicsContext3D* createGraphicsContext3D();
   virtual double audioHardwareSampleRate();
   virtual size_t audioHardwareBufferSize();
   virtual WebKit::WebAudioDevice* createAudioDevice(
       size_t buffer_size, unsigned channels, double sample_rate,
       WebKit::WebAudioDevice::RenderCallback* callback);
 
   virtual WebKit::WebBlobRegistry* blobRegistry();
 
+  virtual WebKit::WebString userAgent(const WebKit::WebURL& url);
+
  private:
   bool CheckPreparsedJsCachingEnabled() const;
 
   // Helper function to send synchronous message from any thread.
   static bool SendSyncMessageFromAnyThread(IPC::SyncMessage* msg);
 
   scoped_ptr<webkit_glue::WebClipboardImpl> clipboard_;
 
   class FileUtilities;
   scoped_ptr<FileUtilities> file_utilities_;
@@ skipping 15 matching lines @@
   scoped_ptr<WebSharedWorkerRepositoryImpl> shared_worker_repository_;
 
   scoped_ptr<WebKit::WebIDBFactory> web_idb_factory_;
 
   scoped_ptr<WebFileSystemImpl> web_file_system_;
 
   scoped_ptr<WebKit::WebBlobRegistry> blob_registry_;
 };
 
 #endif  // CONTENT_RENDERER_RENDERER_WEBKITPLATFORMSUPPORT_IMPL_H_