We have a problem in the process on destroying WebContentsImpl because

content/shell/browser/webkit_test_controller.h

 // Copyright 2013 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 CONTENT_SHELL_BROWSER_WEBKIT_TEST_CONTROLLER_H_
 #define CONTENT_SHELL_BROWSER_WEBKIT_TEST_CONTROLLER_H_
 
 #include <ostream>
 #include <string>
 
@@ skipping 117 matching lines @@
   void set_printer(WebKitTestResultPrinter* printer) {
     printer_.reset(printer);
   }
 
   // WebContentsObserver implementation.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void PluginCrashed(const base::FilePath& plugin_path,
                              base::ProcessId plugin_pid) OVERRIDE;
   virtual void RenderViewCreated(RenderViewHost* render_view_host) OVERRIDE;
   virtual void RenderProcessGone(base::TerminationStatus status) OVERRIDE;
-  virtual void WebContentsDestroyed(WebContents* web_contents) OVERRIDE;
+  virtual void WebContentsDestroyed() OVERRIDE;
 
   // NotificationObserver implementation.
   virtual void Observe(int type,
                        const NotificationSource& source,
                        const NotificationDetails& details) OVERRIDE;
 
   // GpuDataManagerObserver implementation.
   virtual void OnGpuProcessCrashed(base::TerminationStatus exit_code) OVERRIDE;
 
  private:
@@ skipping 67 matching lines @@
   // waiting on the UI thread while layout tests are being ran.
   ScopedAllowWaitForAndroidLayoutTests reduced_restrictions_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(WebKitTestController);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_BROWSER_WEBKIT_TEST_CONTROLLER_H_