Move ExtensionFunction to the extensions component.

chrome/browser/extensions/api/identity_private/identity_private_api.h

 // Copyright (c) 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_IDENTITY_PRIVATE_IDENTITY_PRIVATE_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_IDENTITY_PRIVATE_IDENTITY_PRIVATE_API_H_
 
-#include "chrome/browser/extensions/extension_function.h"
+#include "extensions/browser/extension_function.h"
 
 namespace extensions {
 
 class IdentityPrivateGetResourcesFunction : public SyncExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("identityPrivate.getResources",
                              IDENTITYPRIVATE_GETRESOURCES);
   IdentityPrivateGetResourcesFunction();
 
  protected:
   virtual ~IdentityPrivateGetResourcesFunction();
 
   // ExtensionFunction:
   virtual bool RunImpl() OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(IdentityPrivateGetResourcesFunction);
 };
 
-}  // extensions
+}  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_IDENTITY_PRIVATE_IDENTITY_PRIVATE_API_H_