Split ExtensionSystem interface from ExtensionSystemImpl implementation, part 1.

chrome/browser/apps/ephemeral_app_browsertest.cc

 // Copyright 2014 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/app_browsertest_util.h"
 #include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/extensions/extension_test_message_listener.h"
 #include "chrome/common/extensions/api/alarms.h"
 #include "content/public/test/browser_test.h"
 #include "content/public/test/test_utils.h"
 #include "extensions/browser/event_router.h"
+#include "extensions/browser/extension_system.h"
 #include "extensions/browser/process_manager.h"
 #include "extensions/common/switches.h"
 
 using extensions::Event;
 using extensions::EventRouter;
 using extensions::Extension;
 using extensions::ExtensionSystem;
 using extensions::PlatformAppBrowserTest;
 
 namespace {
@@ skipping 170 matching lines @@
       ExtensionSystem::Get(browser()->profile())->extension_service();
   EXPECT_TRUE(service->UpdateExtension(app_id, app_v2_path, true, GURL(),
                                        &crx_installer));
   windowed_observer.Wait();
 
   const Extension* app_v2 = service->GetExtensionById(app_id, false);
   ASSERT_TRUE(app_v2);
   EXPECT_TRUE(app_v2->version()->CompareTo(app_original_version) > 0);
   EXPECT_TRUE(app_v2->is_ephemeral());
 }