Bye bye Mandoline

components/html_viewer/html_frame_tree_manager_observer.h

-// Copyright 2015 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_HTML_VIEWER_HTML_FRAME_TREE_MANAGER_OBSERVER_H_
-#define COMPONENTS_HTML_VIEWER_HTML_FRAME_TREE_MANAGER_OBSERVER_H_
-
-namespace html_viewer {
-
-// Used to inform observers of interesting events to HTMLFrameTreeManager.
-class HTMLFrameTreeManagerObserver {
- public:
-  // The change_id of the HTMLFrameTreeManager has advanced. In other words,
-  // a structure change was done.
-  virtual void OnHTMLFrameTreeManagerChangeIdAdvanced() = 0;
-
-  // The HTMLFrameTreeManager was destroyed.
-  virtual void OnHTMLFrameTreeManagerDestroyed() = 0;
-
- protected:
-  virtual ~HTMLFrameTreeManagerObserver() {}
-};
-
-}  // namespace html_viewer
-
-#endif  // COMPONENTS_HTML_VIEWER_HTML_FRAME_TREE_MANAGER_OBSERVER_H_