Move system.* family of APIs to extensions/

chrome/browser/extensions/api/system_info/system_info_api.h

-// 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.
-
-#ifndef CHROME_BROWSER_EXTENSIONS_API_SYSTEM_INFO_SYSTEM_INFO_API_H_
-#define CHROME_BROWSER_EXTENSIONS_API_SYSTEM_INFO_SYSTEM_INFO_API_H_
-
-#include "extensions/browser/browser_context_keyed_api_factory.h"
-#include "extensions/browser/event_router.h"
-
-namespace extensions {
-
-// A Profile-scoped object which is registered as an observer of EventRouter
-// to observe the systemInfo event listener arrival/removal.
-class SystemInfoAPI : public BrowserContextKeyedAPI,
-                      public EventRouter::Observer {
- public:
-  // BrowserContextKeyedAPI implementation.
-  static BrowserContextKeyedAPIFactory<SystemInfoAPI>* GetFactoryInstance();
-
-  explicit SystemInfoAPI(content::BrowserContext* context);
-  virtual ~SystemInfoAPI();
-
-  // KeyedService implementation.
-  virtual void Shutdown() OVERRIDE;
-
-  // EventRouter::Observer implementation.
-  virtual void OnListenerAdded(const EventListenerInfo& details) OVERRIDE;
-  virtual void OnListenerRemoved(const EventListenerInfo& details) OVERRIDE;
-
- private:
-  friend class BrowserContextKeyedAPIFactory<SystemInfoAPI>;
-
-  // BrowserContextKeyedAPI implementation.
-  static const char* service_name() {
-    return "SystemInfoAPI";
-  }
-  static const bool kServiceIsNULLWhileTesting = true;
-
-  content::BrowserContext* browser_context_;
-
-  DISALLOW_COPY_AND_ASSIGN(SystemInfoAPI);
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_SYSTEM_INFO_SYSTEM_INFO_API_H_