Pass a DWORD_PTR to SendMessageTimeout in HungWindowDetector::CheckChildWindow

chrome/browser/hang_monitor/hung_window_detector.cc

 // 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.
 
 #include "chrome/browser/hang_monitor/hung_window_detector.h"
 
 #include <windows.h>
 #include <atlbase.h>
 
 #include "base/logging.h"
@@ skipping 85 matching lines @@
     // value specified by the message_response_timeout_ member. It is
     // tracked by a property on the child window.
 #pragma warning(disable:4311)
     int child_window_message_timeout =
         reinterpret_cast<int>(GetProp(child_window, kHungChildWindowTimeout));
 #pragma warning(default:4311)
     if (!child_window_message_timeout) {
       child_window_message_timeout = message_response_timeout_;
     }
 
-    DWORD result = 0;
+    DWORD_PTR result = 0;
     if (0 == SendMessageTimeout(child_window,
                                 WM_NULL,
                                 0,
                                 0,
                                 SMTO_BLOCK,
                                 child_window_message_timeout,
                                 &result)) {
       HungWindowNotification::ActionOnHungWindow action =
           HungWindowNotification::HUNG_WINDOW_IGNORE;
 #pragma warning(disable:4312)
@@ skipping 42 matching lines @@
                                                    LPARAM param) {
   HungWindowDetector* detector_instance =
       reinterpret_cast<HungWindowDetector*>(param);
   if (NULL == detector_instance) {
     NOTREACHED();
     return FALSE;
   }
 
   return detector_instance->CheckChildWindow(child_window);
 }