Re-reland Propagate OnNativeWidgetMove to delegate/observers, etc.

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

Index: chrome/browser/ui/views/frame/browser_window_move_observer.h
diff --git a/chrome/browser/ui/views/frame/browser_window_move_observer.h b/chrome/browser/ui/views/frame/browser_window_move_observer.h
deleted file mode 100644
index ac4b54ec984e40b8dd89541f467c5f1041b19c4f..0000000000000000000000000000000000000000
--- a/chrome/browser/ui/views/frame/browser_window_move_observer.h
+++ /dev/null
@@ -1,18 +0,0 @@
-// 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.
-
-#ifndef CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_WINDOW_MOVE_OBSERVER_H_
-#define CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_WINDOW_MOVE_OBSERVER_H_
-#pragma once
-
-// BrowserView notifies BrowserWindowMoveObserver as the window moves.
-class BrowserWindowMoveObserver {
- public:
-  virtual void OnWidgetMoved() = 0;
-
- protected:
-  ~BrowserWindowMoveObserver() {}
-};
-
-#endif  // CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_WINDOW_MOVE_OBSERVER_H_