Make startup_tests build and work on Mac.

chrome/browser/automation/automation_provider_list.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/browser/automation/automation_provider_list.h"
 
 #include <algorithm>
 #include "base/logging.h"
 #include "chrome/browser/automation/automation_provider.h"
 
@@ skipping 19 matching lines @@
   return true;
 }
 
 bool AutomationProviderList::RemoveProvider(AutomationProvider* provider) {
   const iterator remove_provider =
     find(automation_providers_.begin(), automation_providers_.end(), provider);
   if (remove_provider != automation_providers_.end()) {
     (*remove_provider)->Release();
     automation_providers_.erase(remove_provider);
     g_browser_process->ReleaseModule();
+    if (automation_providers_.empty())
+      OnLastProviderRemoved();
     return true;
   }
   return false;
 }
 
 AutomationProviderList* AutomationProviderList::GetInstance() {
   if (!instance_) {
     instance_ = new AutomationProviderList;
   }
   DCHECK(NULL != instance_);
   return instance_;
 }