chrome/browser/ui/views/frame/web_contents_close_handler_delegate.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_UI_VIEWS_FRAME_WEB_CONTENTS_CLOSE_HANDLER_DELEGATE_H_
   6 #define CHROME_BROWSER_UI_VIEWS_FRAME_WEB_CONTENTS_CLOSE_HANDLER_DELEGATE_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/scoped_ptr.h"
  10
  11 namespace ui {
  12 class LayerTreeOwner;
  13 }
  14
  15 // WebContentsCloseHandler delegate.
  16 class WebContentsCloseHandlerDelegate {
  17  public:
  18   // Invoked to clone the layers of the WebContents. Should do nothing if there
  19   // is already a clone (eg CloneWebContentsLayer() has been invoked without a
  20   // DestroyClonedLayer()) or no WebContents. It is expected that when this is
  21   // invoked the cloned layer tree is drawn on top of the existing WebContents.
  22   virtual void CloneWebContentsLayer() = 0;
  23
  24   // Invoked to destroy the cloned layer tree. This may be invoked when there is
  25   // no cloned layer tree.
  26   virtual void DestroyClonedLayer() = 0;
  27
  28  protected:
  29   virtual ~WebContentsCloseHandlerDelegate() {}
  30 };
  31
  32 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_WEB_CONTENTS_CLOSE_HANDLER_DELEGATE_H_