Move ExtensionFunction to the extensions component.

chrome/browser/extensions/api/system_storage/system_storage_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_STORAGE_SYSTEM_STORAGE_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_SYSTEM_STORAGE_SYSTEM_STORAGE_API_H_
 
 #include "chrome/browser/extensions/api/system_storage/storage_info_provider.h"
-#include "chrome/browser/extensions/extension_function.h"
 #include "chrome/browser/storage_monitor/storage_monitor.h"
+#include "extensions/browser/extension_function.h"
 
 namespace extensions {
 
 // Implementation of the systeminfo.storage.get API. It is an asynchronous
 // call relative to browser UI thread.
 class SystemStorageGetInfoFunction : public AsyncExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("system.storage.getInfo", SYSTEM_STORAGE_GETINFO);
   SystemStorageGetInfoFunction();
 
@@ skipping 34 matching lines @@
   void OnStorageMonitorInit(const std::string& transient_id);
   void OnQueryCompleted(const std::string& transient_id,
                         double available_capacity);
   virtual ~SystemStorageGetAvailableCapacityFunction();
   virtual bool RunImpl() OVERRIDE;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_SYSTEM_STORAGE_SYSTEM_STORAGE_API_H_