Avoid including gtest file directly, and go through base instead

chrome/browser/sync/glue/http_bridge.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 CHROME_BROWSER_SYNC_GLUE_HTTP_BRIDGE_H_
 #define CHROME_BROWSER_SYNC_GLUE_HTTP_BRIDGE_H_
 #pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
+#include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/synchronization/lock.h"
 #include "base/synchronization/waitable_event.h"
 #include "chrome/browser/sync/internal_api/http_post_provider_factory.h"
 #include "chrome/browser/sync/internal_api/http_post_provider_interface.h"
 #include "content/public/common/url_fetcher_delegate.h"
 #include "googleurl/src/gurl.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "net/url_request/url_request_context.h"
-#include "testing/gtest/include/gtest/gtest_prod.h"
 
 class MessageLoop;
 class HttpBridgeTest;
 
 namespace net {
 class HttpResponseHeaders;
 }
 
 namespace browser_sync {
 
@@ skipping 185 matching lines @@
   HttpBridge::RequestContextGetter* GetRequestContextGetter();
 
   scoped_refptr<HttpBridge::RequestContextGetter> request_context_getter_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpBridgeFactory);
 };
 
 }  //  namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_HTTP_BRIDGE_H_