Move ExtensionSystem into extensions namespace

chrome/browser/extensions/extension_context_menu_model.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/extensions/extension_context_menu_model.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/extensions/extension_tab_helper.h"
@@ skipping 65 matching lines @@
     return extension->GetHomepageURL().is_valid();
   } else if (command_id == INSPECT_POPUP) {
     TabContents* tab_contents = chrome::GetActiveTabContents(browser_);
     if (!tab_contents)
       return false;
 
     return extension_action_->HasPopup(
         tab_contents->extension_tab_helper()->tab_id());
   } else if (command_id == DISABLE || command_id == UNINSTALL) {
     // Some extension types can not be disabled or uninstalled.
-    return ExtensionSystem::Get(
+    return extensions::ExtensionSystem::Get(
         profile_)->management_policy()->UserMayModifySettings(extension, NULL);
   }
   return true;
 }
 
 bool ExtensionContextMenuModel::GetAcceleratorForCommandId(
     int command_id, ui::Accelerator* accelerator) {
   return false;
 }
 
@@ skipping 77 matching lines @@
   if (extension->browser_action())
     AddItemWithStringId(HIDE, IDS_EXTENSIONS_HIDE_BUTTON);
   AddSeparator();
   AddItemWithStringId(MANAGE, IDS_MANAGE_EXTENSIONS);
 }
 
 const Extension* ExtensionContextMenuModel::GetExtension() const {
   ExtensionService* extension_service = profile_->GetExtensionService();
   return extension_service->GetExtensionById(extension_id_, false);
 }