Consolidate Widget Event code, other cleanup.

views/widget/tooltip_manager_win.h

Index: views/widget/tooltip_manager_win.h
diff --git a/views/widget/tooltip_manager_win.h b/views/widget/tooltip_manager_win.h
index add45314ab96b70766f283399a74789262dfe773..d6a9a352fb968011f99a0f45c185fb47a9e396df 100644
--- a/views/widget/tooltip_manager_win.h
+++ b/views/widget/tooltip_manager_win.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
@@ -77,8 +77,6 @@ class TooltipManagerWin : public TooltipManager {
   // Message handlers. These forward to the tooltip control.
   virtual void OnMouse(UINT u_msg, WPARAM w_param, LPARAM l_param);
   LRESULT OnNotify(int w_param, NMHDR* l_param, bool* handled);
-  // Not used directly by TooltipManager, but provided for AeroTooltipManager.
-  virtual void OnMouseLeave() {}
 
  protected:
   virtual void Init();