We have a problem in the process on destroying WebContentsImpl because

chrome/browser/policy/policy_browsertest.cc

 // Copyright (c) 2012 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 <algorithm>
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 479 matching lines @@
     : public content::WebContentsObserver {
  public:
   explicit WebContentsLoadedOrDestroyedWatcher(
       content::WebContents* web_contents);
   virtual ~WebContentsLoadedOrDestroyedWatcher();
 
   // Waits until the WebContents's load is done or until it is destroyed.
   void Wait();
 
   // Overridden WebContentsObserver methods.
-  virtual void WebContentsDestroyed(
-      content::WebContents* web_contents) OVERRIDE;
+  virtual void WebContentsDestroyed() OVERRIDE;
   virtual void DidStopLoading(
       content::RenderViewHost* render_view_host) OVERRIDE;
 
  private:
   scoped_refptr<content::MessageLoopRunner> message_loop_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsLoadedOrDestroyedWatcher);
 };
 
 WebContentsLoadedOrDestroyedWatcher::WebContentsLoadedOrDestroyedWatcher(
     content::WebContents* web_contents)
     : content::WebContentsObserver(web_contents),
       message_loop_runner_(new content::MessageLoopRunner) {
 }
 
 WebContentsLoadedOrDestroyedWatcher::~WebContentsLoadedOrDestroyedWatcher() {}
 
 void WebContentsLoadedOrDestroyedWatcher::Wait() {
   message_loop_runner_->Run();
 }
 
-void WebContentsLoadedOrDestroyedWatcher::WebContentsDestroyed(
-    content::WebContents* web_contents) {
+void WebContentsLoadedOrDestroyedWatcher::WebContentsDestroyed() {
   message_loop_runner_->Quit();
 }
 
 void WebContentsLoadedOrDestroyedWatcher::DidStopLoading(
     content::RenderViewHost* render_view_host) {
   message_loop_runner_->Quit();
 }
 
 #if !defined(OS_MACOSX)
 
@@ skipping 2428 matching lines @@
   PrefService* prefs = browser()->profile()->GetPrefs();
   EXPECT_TRUE(extensions::NativeMessageProcessHost::IsHostAllowed(
       prefs, "host.name"));
   EXPECT_FALSE(extensions::NativeMessageProcessHost::IsHostAllowed(
       prefs, "other.host.name"));
 }
 
 #endif  // !defined(CHROME_OS)
 
 }  // namespace policy