Split ExtensionSystem interface from ExtensionSystemImpl implementation, part 1.

chrome/browser/apps/ephemeral_app_service.cc

 // Copyright 2013 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/apps/ephemeral_app_service.h"
 
 #include "base/command_line.h"
 #include "chrome/browser/apps/ephemeral_app_service_factory.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/extensions/extension_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_switches.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/notification_types.h"
 #include "extensions/browser/extension_prefs.h"
+#include "extensions/browser/extension_system.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_set.h"
 
 using extensions::Extension;
 using extensions::ExtensionPrefs;
 using extensions::ExtensionSet;
 using extensions::ExtensionSystem;
 using extensions::InstalledExtensionInfo;
 
 namespace {
@@ skipping 190 matching lines @@
     // Remove ephemeral apps that have been inactive for a while or if the cache
     // is larger than the desired size.
     if (it->first < inactive_threshold || app_count > kMaxEphemeralAppsCount) {
       remove_app_ids->insert(it->second);
       --app_count;
     } else {
       break;
     }
   }
 }