Remove a chrome dependency by removing Prerender from ResourceDispatcherHost.

chrome/browser/browser_process_impl.h

Index: chrome/browser/browser_process_impl.h
diff --git a/chrome/browser/browser_process_impl.h b/chrome/browser/browser_process_impl.h
index 577d4ba71b53b914a1a262eae239179dd4daf77b..eb8a9b6a1e652b01a91c03031680ccd69883dbec 100644
--- a/chrome/browser/browser_process_impl.h
+++ b/chrome/browser/browser_process_impl.h
@@ -28,6 +28,7 @@
 #include "ipc/ipc_message.h"
 
 class ChromeNetLog;
+class ChromeResourceDispatcherHostObserver;
 class CommandLine;
 class DevToolsHttpProtocolHandler;
 class DevToolsProtocolHandler;
@@ -111,6 +112,8 @@ class BrowserProcessImpl : public BrowserProcess,
 
   virtual ChromeNetLog* net_log();
 
+  virtual prerender::PrerenderTracker* prerender_tracker();
+
 #if defined(IPC_MESSAGE_LOG_ENABLED)
   virtual void SetIPCLoggingEnabled(bool enable);
 #endif
@@ -276,6 +279,13 @@ class BrowserProcessImpl : public BrowserProcess,
   // Lives here so can safely log events on shutdown.
   scoped_ptr<ChromeNetLog> net_log_;
 
+  // Ordered before resource_dispatcher_host_observer_ due to destruction
+  // ordering.
+  scoped_ptr<prerender::PrerenderTracker> prerender_tracker_;
+
+  scoped_ptr<ChromeResourceDispatcherHostObserver>
+      resource_dispatcher_host_observer_;
+
   NotificationRegistrar notification_registrar_;
   scoped_refptr<PluginDataRemover> plugin_data_remover_;