Add Vector2d classes that represent offsets, instead of using Point.

chrome/browser/ui/views/constrained_window_views.cc

 // 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 "chrome/browser/ui/views/constrained_window_views.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/utf_string_conversions.h"
@@ skipping 733 matching lines @@
   DCHECK(enable_chrome_style_);
   ConstrainedWindowTabHelperDelegate* tab_helper_delegate =
       ConstrainedWindowTabHelper::FromWebContents(web_contents_)->delegate();
   gfx::Point point;
   if (!tab_helper_delegate ||
       !tab_helper_delegate->GetConstrainedWindowTopCenter(&point)) {
     Widget::CenterWindow(size);
     return;
   }
 
-  SetBounds(gfx::Rect(point - gfx::Point(size.width() / 2, 0), size));
+  SetBounds(gfx::Rect(point - gfx::Vector2d(size.width() / 2, 0), size));
 }