Ignore DevTools messages from the old inspected RVH after navigation

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"
 
 namespace content {
 
-class RenderViewHost;
+class WebContents;
 
 // This class dispatches messages between DevTools frontend and Delegate
 // which is implemented by the embedder.
 // This allows us to avoid exposing DevTools frontend messages through
 // the content public API.
 class DevToolsFrontendHost {
  public:
   // Delegate actually handles messages from frontend.
   class Delegate {
    public:
     virtual ~Delegate() {}
 
     // Message is coming from frontend to the embedder.
     virtual void HandleMessageFromDevToolsFrontend(
         const std::string& message) = 0;
 
     // Message is coming from frontend to the backend.
     // TODO(dgozman): remove this by making one of the possible messages
     // passed via the method above.
     virtual void HandleMessageFromDevToolsFrontendToBackend(
         const std::string& message) = 0;
   };
 
-  // Creates a new DevToolsFrontendHost for RenderViewHost where DevTools
+  // Creates a new DevToolsFrontendHost for WebContents where DevTools
   // frontend is loaded.
   CONTENT_EXPORT static DevToolsFrontendHost* Create(
-      RenderViewHost* frontend_rvh, Delegate* delegate);
+      WebContents* frontend_web_contents,
+      Delegate* delegate);
 
   CONTENT_EXPORT virtual ~DevToolsFrontendHost() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DEVTOOLS_FRONTEND_HOST_H_