Remove a chrome dependency by removing Prerender from ResourceDispatcherHost.

chrome/browser/browser_process.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.
 
 // This interface is for managing the global services of the application. Each
 // service is lazily created when requested the first time. The service getters
 // will return NULL if the service is not available, so callers must check for
 // this condition.
 
 #ifndef CHROME_BROWSER_BROWSER_PROCESS_H_
@@ skipping 40 matching lines @@
 #if defined(OS_CHROMEOS)
 namespace chromeos {
 class ProxyConfigServiceImpl;
 }
 #endif  // defined(OS_CHROMEOS)
 
 namespace net {
 class URLRequestContextGetter;
 }
 
+namespace prerender {
+class PrerenderTracker;
+}
+
 namespace printing {
 class BackgroundPrintingManager;
 class PrintJobManager;
 class PrintPreviewTabController;
 }
 
 namespace policy {
 class BrowserPolicyConnector;
 }
 
@@ skipping 143 matching lines @@
   // browser. Note that restart code will strip some of the command line keys
   // and all loose values from the cl this instance of Chrome was launched with,
   // and add the command line key that will force Chrome to start in the
   // background mode. For the full list of "blacklisted" keys, refer to
   // |kSwitchesToRemoveOnAutorestart| array in browser_process_impl.cc.
   virtual void StartAutoupdateTimer() = 0;
 #endif
 
   virtual ChromeNetLog* net_log() = 0;
 
+  virtual prerender::PrerenderTracker* prerender_tracker() = 0;
+
 #if defined(IPC_MESSAGE_LOG_ENABLED)
   // Enable or disable IPC logging for the browser, all processes
   // derived from ChildProcess (plugin etc), and all
   // renderers.
   virtual void SetIPCLoggingEnabled(bool enable) = 0;
 #endif
 
   const std::string& plugin_data_remover_mime_type() const {
     return plugin_data_remover_mime_type_;
   }
 
   void set_plugin_data_remover_mime_type(const std::string& mime_type) {
     plugin_data_remover_mime_type_ = mime_type;
   }
 
  private:
   // User-data-dir based profiles.
   std::vector<std::wstring> user_data_dir_profiles_;
 
   // Used for testing plugin data removal at shutdown.
   std::string plugin_data_remover_mime_type_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserProcess);
 };
 
 extern BrowserProcess* g_browser_process;
 
 #endif  // CHROME_BROWSER_BROWSER_PROCESS_H_