Remove a chrome dependency by removing Prerender from ResourceDispatcherHost.

chrome/browser/profiles/profile_impl.cc

 // 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.
 
 #include "chrome/browser/profiles/profile_impl.h"
 
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/environment.h"
 #include "base/file_path.h"
@@ skipping 1627 matching lines @@
 PrefProxyConfigTracker* ProfileImpl::GetProxyConfigTracker() {
   if (!pref_proxy_config_tracker_)
     pref_proxy_config_tracker_ = new PrefProxyConfigTracker(GetPrefs());
 
   return pref_proxy_config_tracker_;
 }
 
 prerender::PrerenderManager* ProfileImpl::GetPrerenderManager() {
   if (!prerender::PrerenderManager::IsPrerenderingPossible())
     return NULL;
-  if (!prerender_manager_.get())
-    prerender_manager_.reset(new prerender::PrerenderManager(this));
+  if (!prerender_manager_.get()) {
+    CHECK(g_browser_process->prerender_tracker());
+    prerender_manager_.reset(
+        new prerender::PrerenderManager(
+            this, g_browser_process->prerender_tracker()));
+  }
   return prerender_manager_.get();
 }