Ignore DevTools messages from the old inspected RVH after navigation

content/shell/browser/shell_devtools_frontend.cc

 // 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.
 
 #include "content/shell/browser/shell_devtools_frontend.h"
 
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 59 matching lines @@
       frontend_shell_(frontend_shell),
       agent_host_(agent_host) {
 }
 
 ShellDevToolsFrontend::~ShellDevToolsFrontend() {
 }
 
 void ShellDevToolsFrontend::RenderViewCreated(
     RenderViewHost* render_view_host) {
   if (!frontend_host_) {
-    frontend_host_.reset(DevToolsFrontendHost::Create(render_view_host, this));
+    frontend_host_.reset(DevToolsFrontendHost::Create(web_contents(), this));
     agent_host_->AttachClient(this);
   }
 }
 
 void ShellDevToolsFrontend::WebContentsDestroyed() {
   agent_host_->DetachClient();
   delete this;
 }
 
 void ShellDevToolsFrontend::HandleMessageFromDevToolsFrontend(
@@ skipping 44 matching lines @@
   base::string16 javascript = base::UTF8ToUTF16(code);
   web_contents()->GetMainFrame()->ExecuteJavaScript(javascript);
 }
 
 void ShellDevToolsFrontend::AgentHostClosed(
     DevToolsAgentHost* agent_host, bool replaced) {
   frontend_shell_->Close();
 }
 
 }  // namespace content