extensions: Add ExtensionView interface.

chrome/browser/extensions/extension_view.h

 // 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 "chromeos/dbus/mock_shill_profile_client.h"
+#ifndef CHROME_BROWSER_UI_EXTENSIONS_EXTENSION_VIEW_H_
+#define CHROME_BROWSER_UI_EXTENSIONS_EXTENSION_VIEW_H_
 
-namespace chromeos {
-
-MockShillProfileClient::MockShillProfileClient() {}
-
-MockShillProfileClient::~MockShillProfileClient() {}
-
-}  // namespace chromeos
+class ExtensionView {
+ public:
+  virtual ~ExtensionView() {}
+};
+#endif  // CHROME_BROWSER_UI_EXTENSIONS_EXTENSION_VIEW_H_