Attempt 2 at landing this....

chrome/browser/automation/automation_profile_impl.cc

 // Copyright (c) 2006-2009 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.
 
 #include "chrome/browser/automation/automation_profile_impl.h"
 #include "chrome/browser/automation/automation_resource_message_filter.h"
 #include "chrome/browser/chrome_thread.h"
 #include "chrome/browser/net/chrome_url_request_context.h"
 #include "chrome/browser/profile.h"
 #include "net/url_request/url_request_context.h"
@@ skipping 87 matching lines @@
     original_cookie_store_->SetCookiesWithOptions(url, cookies, options);
   }
   virtual std::string GetCookies(const GURL& url) {
     return original_cookie_store_->GetCookies(url);
   }
   virtual std::string GetCookiesWithOptions(const GURL& url,
                                             const net::CookieOptions& options) {
     return original_cookie_store_->GetCookiesWithOptions(url, options);
   }
 
+  virtual void DeleteCookie(const GURL& url,
+                            const std::string& cookie_name) {
+    return original_cookie_store_->DeleteCookie(url, cookie_name);
+  }
+
  protected:
   void SendIPCMessageOnIOThread(IPC::Message* m) {
     if (ChromeThread::CurrentlyOn(ChromeThread::IO)) {
       automation_client_->Send(m);
     } else {
       Task* task = NewRunnableMethod(this,
           &AutomationCookieStore::SendIPCMessageOnIOThread, m);
       ChromeThread::PostTask(ChromeThread::IO, FROM_HERE, task);
     }
   }
@@ skipping 49 matching lines @@
   ChromeURLRequestContextGetter* request_context =
       new ChromeURLRequestContextGetter(
           NULL,  // Don't register an observer on PrefService.
           new Factory(original_context, profile, automation_client,
                       tab_handle));
   return request_context;
 }
 
 }  // namespace AutomationRequestContext