Add AppDelegate::ResizeWebContents

apps/ui/web_contents_sizer.mm

-// 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.
-
-#include "apps/ui/web_contents_sizer.h"
-
-#import <Cocoa/Cocoa.h>
-
-#include "content/public/browser/web_contents.h"
-
-namespace apps {
-
-void ResizeWebContents(content::WebContents* web_contents,
-                       const gfx::Size& new_size) {
-  NSView* view = web_contents->GetNativeView();
-  NSRect old_wcv_frame = [view frame];
-  CGFloat new_x = old_wcv_frame.origin.x;
-  CGFloat new_y =
-      old_wcv_frame.origin.y + (old_wcv_frame.size.height - new_size.height());
-  NSRect new_wcv_frame =
-      NSMakeRect(new_x, new_y, new_size.width(), new_size.height());
-  [view setFrame:new_wcv_frame];
-}
-
-}  // namespace apps