Ignore DevTools messages from the old inspected RVH after navigation

content/public/browser/devtools_frontend_host.h

Index: content/public/browser/devtools_frontend_host.h
diff --git a/content/public/browser/devtools_frontend_host.h b/content/public/browser/devtools_frontend_host.h
index 24c50f51e07b1e61ac22fb15c40db11c36d65f22..d1b01fe537a1c5d2f196483130520f5ee8c6d665 100644
--- a/content/public/browser/devtools_frontend_host.h
+++ b/content/public/browser/devtools_frontend_host.h
@@ -11,7 +11,7 @@
 
 namespace content {
 
-class RenderViewHost;
+class WebContents;
 
 // This class dispatches messages between DevTools frontend and Delegate
 // which is implemented by the embedder.
@@ -35,10 +35,11 @@ class DevToolsFrontendHost {
         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() {}
 };