MacViews: Add a CreateChromeConstrainedWindowViewsClient stub

components/constrained_window/constrained_window_views_client.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 COMPONENTS_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_VIEWS_CLIENT_H_
 #define COMPONENTS_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_VIEWS_CLIENT_H_
 
 #include "ui/gfx/native_widget_types.h"
 
 namespace content {
 class WebContents;
 }
 
 namespace web_modal {
 class ModalDialogHost;
 }
 
 class ConstrainedWindowViewsClient {
  public:
   virtual ~ConstrainedWindowViewsClient() {}
 
   // Returns the web contents that a constrained window should be modal to
   // in the embedder's context.
   virtual content::WebContents* GetEmbedderWebContents(
       content::WebContents* initiator_web_contents) = 0;
 
   // Returns the modal window host for the |parent| native window.

[msw, 2014/11/03 19:20:33]

nit: update comment: s/native window/native view/?

[tapted, 2014/11/04 00:14:33]

Done.

   virtual web_modal::ModalDialogHost* GetModalDialogHost(
-      gfx::NativeWindow parent) = 0;
+      gfx::NativeView parent) = 0;
 };
 
 #endif  // COMPONENTS_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_VIEWS_CLIENT_H_