Fix bug 62037: Task manager tooltips appear behind task manager if 'Always on Top' is checked.

content/browser/renderer_host/render_widget_host_view_win.cc

 // 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.
 
 #include "content/browser/renderer_host/render_widget_host_view_win.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 2218 matching lines @@
 void RenderWidgetHostViewWin::EnsureTooltip() {
   UINT message = TTM_NEWTOOLRECT;
 
   TOOLINFO ti;
   ti.cbSize = sizeof(ti);
   ti.hwnd = m_hWnd;
   ti.uId = 0;
   if (!::IsWindow(tooltip_hwnd_)) {
     message = TTM_ADDTOOL;
     tooltip_hwnd_ = CreateWindowEx(
-        WS_EX_TRANSPARENT | l10n_util::GetExtendedTooltipStyles(),
+        WS_EX_TRANSPARENT | WS_EX_TOPMOST |
+            l10n_util::GetExtendedTooltipStyles(),
         TOOLTIPS_CLASS, NULL, TTS_NOPREFIX, 0, 0, 0, 0, m_hWnd, NULL,
         NULL, NULL);
     if (!tooltip_hwnd_) {
       // Tooltip creation can inexplicably fail. See bug 82913 for details.
       LOG_GETLASTERROR(WARNING) <<
           "Tooltip creation failed, tooltips won't work";
       return;
     }
     ti.uFlags = TTF_TRANSPARENT;
     ti.lpszText = LPSTR_TEXTCALLBACK;
@@ skipping 248 matching lines @@
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostView, public:
 
 // static
 RenderWidgetHostView* RenderWidgetHostView::CreateViewForWidget(
     RenderWidgetHost* widget) {
   return new RenderWidgetHostViewWin(widget);
 }