Fixes bug where tooltips would get stuck. This was happening because...

chrome/views/container_win.cc

 // Copyright (c) 2006-2008 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.
 
 #include "chrome/views/container_win.h"
 
 #include "base/gfx/native_theme.h"
 #include "base/string_util.h"
 #include "base/win_util.h"
 #include "chrome/app/chrome_dll_resource.h"
@@ skipping 514 matching lines @@
                                       UINT message) {
   SetMsgHandled(FALSE);
   return MA_ACTIVATE;
 }
 
 void ContainerWin::OnMouseMove(UINT flags, const CPoint& point) {
   ProcessMouseMoved(point, flags, false);
 }
 
 LRESULT ContainerWin::OnMouseLeave(UINT uMsg, WPARAM w_param, LPARAM l_param) {
+  tooltip_manager_->OnMouseLeave();
   ProcessMouseExited();
   return 0;
 }
 
 LRESULT ContainerWin::OnMouseWheel(UINT flags, short distance,
                                    const CPoint& point) {
   MouseWheelEvent e(distance,
                     point.x,
                     point.y,
                     Event::ConvertWindowsFlags(flags));
@@ skipping 373 matching lines @@
     result = DefWindowProc(window, message, w_param, l_param);
   if (message == WM_NCDESTROY) {
     vc->hwnd_ = NULL;
     vc->OnFinalMessage(window);
   }
   return result;
 }
 
 }  // namespace views