Attempt at fixing reliability crash. If the AutomationProvider goes

chrome/browser/automation/automation_provider_observers.cc

 // Copyright (c) 2010 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/automation/automation_provider_observers.h"
 
 #include <deque>
 #include <string>
 #include <vector>
 
@@ skipping 805 matching lines @@
   return result;
 }
 
 void ExecuteBrowserCommandObserver::Observe(
     NotificationType type, const NotificationSource& source,
     const NotificationDetails& details) {
   if (type == notification_type_) {
     AutomationMsg_WindowExecuteCommand::WriteReplyParams(reply_message_,
                                                          true);
     automation_->Send(reply_message_);
+    reply_message_ = NULL;
     delete this;
   } else {
     NOTREACHED();
   }
 }
 
 ExecuteBrowserCommandObserver::ExecuteBrowserCommandObserver(
     AutomationProvider* automation, IPC::Message* reply_message)
     : automation_(automation),
       notification_type_(NotificationType::ALL),
@@ skipping 794 matching lines @@
                  NotificationService::AllSources());
 }
 
 void RendererProcessClosedObserver::Observe(
     NotificationType type,
     const NotificationSource& source,
     const NotificationDetails& details) {
   AutomationJSONReply(automation_, reply_message_).SendSuccess(NULL);
   delete this;
 }