Split ExtensionSystem interface from ExtensionSystemImpl implementation, part 1.

chrome/browser/extensions/event_router_forwarder.cc

 // Copyright (c) 2012 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/extensions/event_router_forwarder.h"
 
 #include "base/bind.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
-#include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "content/public/browser/browser_thread.h"
 #include "extensions/browser/event_router.h"
+#include "extensions/browser/extension_system.h"
 #include "url/gurl.h"
 
 using content::BrowserThread;
 
 namespace extensions {
 
 EventRouterForwarder::EventRouterForwarder() {
 }
 
 EventRouterForwarder::~EventRouterForwarder() {
@@ skipping 103 matching lines @@
   event->event_url = event_url;
   if (extension_id.empty()) {
     ExtensionSystem::Get(profile)->event_router()->BroadcastEvent(event.Pass());
   } else {
     ExtensionSystem::Get(profile)->event_router()->
         DispatchEventToExtension(extension_id, event.Pass());
   }
 }
 
 }  // namespace extensions