Split ExtensionSystem interface from ExtensionSystemImpl implementation, part 1.

chrome/browser/chrome_browser_main.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/chrome_browser_main.h"
 
 #if defined(TOOLKIT_GTK)
 #include <gtk/gtk.h>
 #endif
 
@@ skipping 36 matching lines @@
 #include "chrome/browser/chrome_browser_main_extra_parts.h"
 #include "chrome/browser/component_updater/component_updater_service.h"
 #include "chrome/browser/component_updater/flash_component_installer.h"
 #include "chrome/browser/component_updater/pnacl/pnacl_component_installer.h"
 #include "chrome/browser/component_updater/recovery_component_installer.h"
 #include "chrome/browser/component_updater/swiftshader_component_installer.h"
 #include "chrome/browser/component_updater/widevine_cdm_component_installer.h"
 #include "chrome/browser/defaults.h"
 #include "chrome/browser/extensions/extension_protocols.h"
 #include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/extensions/startup_helper.h"
 #include "chrome/browser/first_run/first_run.h"
 #include "chrome/browser/first_run/upgrade_util.h"
 #include "chrome/browser/google/google_search_counter.h"
 #include "chrome/browser/google/google_util.h"
 #include "chrome/browser/gpu/gl_string_manager.h"
 #include "chrome/browser/jankometer.h"
 #include "chrome/browser/media/media_capture_devices_dispatcher.h"
 #include "chrome/browser/metrics/field_trial_synchronizer.h"
 #include "chrome/browser/metrics/metrics_log.h"
@@ skipping 53 matching lines @@
 #include "components/startup_metric_utils/startup_metric_utils.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/site_instance.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/main_function_params.h"
+#include "extensions/browser/extension_system.h"
 #include "grit/app_locale_settings.h"
 #include "grit/browser_resources.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "grit/platform_locale_settings.h"
 #include "net/base/net_module.h"
 #include "net/base/sdch_manager.h"
 #include "net/cookies/cookie_monster.h"
 #include "net/http/http_network_layer.h"
 #include "net/http/http_stream_factory.h"
@@ skipping 1555 matching lines @@
   chromeos::CrosSettings::Shutdown();
 #endif
 #endif
 }
 
 // Public members:
 
 void ChromeBrowserMainParts::AddParts(ChromeBrowserMainExtraParts* parts) {
   chrome_extra_parts_.push_back(parts);
 }