Split ExtensionSystem interface from ExtensionSystemImpl implementation, part 1.

chrome/browser/ui/webui/extensions/extension_settings_browsertest.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/ui/webui/extensions/extension_settings_browsertest.h"
 
 #include "base/files/file_path.h"
 #include "base/path_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/crx_installer.h"
 #include "chrome/browser/extensions/extension_error_reporter.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
 #include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/extensions/unpacked_installer.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/chrome_paths.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/test_utils.h"
+#include "extensions/browser/extension_system.h"
 #include "extensions/common/extension_set.h"
 
 using extensions::Extension;
 
 ExtensionSettingsUIBrowserTest::ExtensionSettingsUIBrowserTest()
     : profile_(NULL) {}
 
 ExtensionSettingsUIBrowserTest::~ExtensionSettingsUIBrowserTest() {}
 
 Profile* ExtensionSettingsUIBrowserTest::GetProfile() {
@@ skipping 86 matching lines @@
          iter != errors->end(); ++iter)
       VLOG(1) << *iter;
 
     return NULL;
   }
 
   if (!observer_->WaitForExtensionViewsToLoad())
     return NULL;
   return service->GetExtensionById(last_loaded_extension_id(), false);
 }