Split ExtensionSystem interface from ExtensionSystemImpl implementation, part 1.

chrome/browser/extensions/api/idle/idle_manager.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/api/idle/idle_manager.h"
 
 #include <utility>
 
 #include "base/stl_util.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/api/idle/idle_api_constants.h"
-#include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/extensions/api/idle.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_source.h"
 #include "extensions/browser/event_router.h"
+#include "extensions/browser/extension_system.h"
 #include "extensions/common/extension.h"
 
 namespace keys = extensions::idle_api_constants;
 namespace idle = extensions::api::idle;
 
 namespace extensions {
 
 namespace {
 
 const int kDefaultIdleThreshold = 60;
@@ skipping 246 matching lines @@
       event_delegate_->OnStateChanged(it->first, new_state);
     }
   }
 
   if (listener_count == 0) {
     StopPolling();
   }
 }
 
 }  // namespace extensions