Make ExtensionContentSettingsStore refcounted.

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 643 matching lines @@
 
   if (extension_message_service_)
     extension_message_service_->DestroyingProfile();
 
   if (pref_proxy_config_tracker_)
     pref_proxy_config_tracker_->DetachFromPrefService();
 
   if (protocol_handler_registry_)
     protocol_handler_registry_->Finalize();
 
+  if (host_content_settings_map_)
+    host_content_settings_map_->ShutdownOnUIThread();
+
   // This causes the Preferences file to be written to disk.
   MarkAsCleanShutdown();
 }
 
 std::string ProfileImpl::GetProfileName() {
   return GetPrefs()->GetString(prefs::kGoogleServicesUsername);
 }
 
 ProfileId ProfileImpl::GetRuntimeId() {
   return reinterpret_cast<ProfileId>(this);
@@ skipping 958 matching lines @@
   if (!prerender::PrerenderManager::IsPrerenderingPossible())
     return NULL;
   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();
 }