Split ExtensionSystem interface from ExtensionSystemImpl implementation, part 1.

chrome/browser/extensions/gtalk_extension_browsertest.cc

 // Copyright (c) 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 "base/bind.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/test/browser_test_utils.h"
+#include "extensions/browser/extension_system.h"
 #include "extensions/browser/process_manager.h"
 
 using content::RenderViewHost;
 using content::WebContents;
 using extensions::Extension;
 
 class GtalkExtensionTest : public ExtensionBrowserTest {
  protected:
   extensions::ProcessManager* GetProcessManager() {
     return extensions::ExtensionSystem::Get(browser()->profile())->
@@ skipping 50 matching lines @@
 };
 
 IN_PROC_BROWSER_TEST_F(GtalkExtensionTest, InstallCurrent) {
   content::WindowedNotificationObserver panel_loaded(
     chrome::NOTIFICATION_EXTENSION_VIEW_REGISTERED,
     content::NotificationService::AllSources());
   InstallGtalkExtension(ReadCurrentVersion());
   panel_loaded.Wait();
   ASSERT_TRUE(GetViewer());
 }