Hopefully the last of the fixes to get Chrome Frame tests going again. Added ...

chrome_frame/chrome_frame_activex_base.h

 // Copyright (c) 2009 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.
 
 #ifndef CHROME_FRAME_CHROME_FRAME_ACTIVEX_BASE_H_
 #define CHROME_FRAME_CHROME_FRAME_ACTIVEX_BASE_H_
 
 #include <atlbase.h>
 #include <atlcom.h>
 #include <atlctl.h>
@@ skipping 487 matching lines @@
     // Only fire the 'interactive' ready state if we aren't there already.
     if (ready_state_ < READYSTATE_INTERACTIVE) {
       ready_state_ = READYSTATE_INTERACTIVE;
       FireOnChanged(DISPID_READYSTATE);
     }
     return 0;
   }
 
   LRESULT OnDestroy(UINT message, WPARAM wparam, LPARAM lparam,
                     BOOL& handled) {  // NO_LINT
-    worker_thread_.message_loop()->PostTask(
-        FROM_HERE, NewRunnableMethod(this, &Base::OnWorkerStop));
-    if (automation_client_.get())
-      automation_client_->CleanupRequests();
-    worker_thread_.Stop();
+    if (worker_thread_.message_loop()) {
+      worker_thread_.message_loop()->PostTask(
+          FROM_HERE, NewRunnableMethod(this, &Base::OnWorkerStop));
+      if (automation_client_.get())
+        automation_client_->CleanupAsyncRequests();
+      worker_thread_.Stop();
+    }
     return 0;
   }
 
   // ChromeFrameDelegate override
   virtual void OnAutomationServerReady() {
     ChromeFramePlugin<T>::OnAutomationServerReady();
 
     ready_state_ = READYSTATE_COMPLETE;
     FireOnChanged(DISPID_READYSTATE);
   }
@@ skipping 482 matching lines @@
   EventHandlers onprivatemessage_;
   EventHandlers onextensionready_;
 
   // The UrlmonUrlRequest instance instantiated for downloading the base URL.
   scoped_refptr<CComObject<UrlmonUrlRequest> > base_url_request_;
 
   base::Thread worker_thread_;
 };
 
 #endif  // CHROME_FRAME_CHROME_FRAME_ACTIVEX_BASE_H_