Cleanup: Remove unused GetTopLevelWidgetForBrowser() function.

chrome/browser/ui/top_level_widget.h

Index: chrome/browser/ui/top_level_widget.h
diff --git a/chrome/browser/ui/top_level_widget.h b/chrome/browser/ui/top_level_widget.h
deleted file mode 100644
index df9b2c2d4362b2adff3823120ce4359d8bec9a61..0000000000000000000000000000000000000000
--- a/chrome/browser/ui/top_level_widget.h
+++ /dev/null
@@ -1,20 +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_TOP_LEVEL_WIDGET_H_
-#define CHROME_BROWSER_UI_TOP_LEVEL_WIDGET_H_
-
-class Browser;
-
-namespace views {
-class Widget;
-}
-
-namespace chrome {
-
-views::Widget* GetTopLevelWidgetForBrowser(Browser* browser);
-
-}  // namespace chrome
-
-#endif  // CHROME_BROWSER_UI_TOP_LEVEL_WIDGET_H_