Fix app_shell shutdown crash due to BrowserContextKeyedServices

chrome/browser/extensions/chrome_extensions_browser_client.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/extensions/chrome_extensions_browser_client.h"
 
 #include "base/command_line.h"
 #include "base/version.h"
 #include "chrome/browser/app_mode/app_mode_utils.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/chrome_app_sorting.h"
 #include "chrome/browser/extensions/extension_prefs.h"
+#include "chrome/browser/extensions/extension_system.h"
+#include "chrome/browser/extensions/extension_system_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/app_modal_dialogs/javascript_dialog_manager.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/common/pref_names.h"
 
 #if defined(OS_CHROMEOS)
 #include "chromeos/chromeos_switches.h"
@@ skipping 124 matching lines @@
 
 bool ChromeExtensionsBrowserClient::IsRunningInForcedAppMode() {
   return chrome::IsRunningInForcedAppMode();
 }
 
 content::JavaScriptDialogManager*
 ChromeExtensionsBrowserClient::GetJavaScriptDialogManager() {
   return GetJavaScriptDialogManagerInstance();
 }
 
+std::vector<BrowserContextKeyedServiceFactory*>
+ChromeExtensionsBrowserClient::GetExtensionSystemDependencies() {
+  std::vector<BrowserContextKeyedServiceFactory*> dependencies;
+  dependencies.push_back(ExtensionSystemSharedFactory::GetInstance());
+  return dependencies;
+}
+
+ExtensionSystem* ChromeExtensionsBrowserClient::CreateExtensionSystem(
+    content::BrowserContext* context) {
+  return new ExtensionSystemImpl(static_cast<Profile*>(context));
+}
+
 }  // namespace extensions