WebView: Cleanup class/struct forward declarations

android_webview/browser/aw_contents_io_thread_client.h

 // 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.
 
 #ifndef ANDROID_WEBVIEW_BROWSER_AW_CONTENTS_IO_THREAD_CLIENT_H_
 #define ANDROID_WEBVIEW_BROWSER_AW_CONTENTS_IO_THREAD_CLIENT_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 
 #include "base/callback_forward.h"
 
-class GURL;
-
 namespace net {
 class HttpResponseHeaders;
 class URLRequest;
 }
 
 namespace android_webview {
 
 class AwWebResourceResponse;
 
 // This class provides a means of calling Java methods on an instance that has
@@ skipping 77 matching lines @@
 
   // Called when a response from the server is received with status code >= 400.
   virtual void OnReceivedHttpError(
       const net::URLRequest* request,
       const net::HttpResponseHeaders* response_headers) = 0;
 };
 
 } // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_AW_CONTENTS_IO_THREAD_CLIENT_H_