Add AppDelegate::ResizeWebContents

apps/ui/web_contents_sizer.h

-// Copyright 2014 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 APPS_UI_WEB_CONTENTS_SIZER_H_
-#define APPS_UI_WEB_CONTENTS_SIZER_H_
-
-namespace content {
-class WebContents;
-}
-
-namespace gfx {
-class Size;
-}
-
-namespace apps {
-// A platform-agnostic function to resize a WebContents. The top-left corner of
-// the WebContents does not move during the resizing.
-void ResizeWebContents(content::WebContents* web_contents,
-                       const gfx::Size& size);
-
-}  // namespace apps
-
-#endif  // APPS_UI_WEB_CONTENTS_SIZER_H_