DevTools: introduce RecordEnumeratedHistogram method.

content/public/browser/devtools_frontend_host.h

 // Copyright 2014 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_PUBLIC_BROWSER_DEVTOOLS_FRONTEND_HOST_H_
 #define CONTENT_PUBLIC_BROWSER_DEVTOOLS_FRONTEND_HOST_H_
 
 #include <string>
 
 #include "content/common/content_export.h"
@@ skipping 24 matching lines @@
         const std::string& message) = 0;
   };
 
   // Creates a new DevToolsFrontendHost for RenderFrameHost where DevTools
   // frontend is loaded.
   CONTENT_EXPORT static DevToolsFrontendHost* Create(
       RenderFrameHost* frontend_main_frame,
       Delegate* delegate);
 
   CONTENT_EXPORT virtual ~DevToolsFrontendHost() {}
+
+  CONTENT_EXPORT virtual void BadMessageRecieved() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DEVTOOLS_FRONTEND_HOST_H_