Ignore DevTools messages from the old inspected RVH after navigation

content/renderer/render_view_impl.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 "content/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/auto_reset.h"
@@ skipping 787 matching lines @@
     OnEnableAutoResize(params->min_size, params->max_size);
   }
 
   new MHTMLGenerator(this);
 #if defined(OS_MACOSX)
   new TextInputClientObserver(this);
 #endif  // defined(OS_MACOSX)
 
   // The next group of objects all implement RenderViewObserver, so are deleted
   // along with the RenderView automatically.
-  devtools_agent_ = new DevToolsAgent(this);
+  devtools_agent_ = new DevToolsAgent(main_render_frame_.get());
   if (RenderWidgetCompositor* rwc = compositor()) {
     webview()->devToolsAgent()->setLayerTreeId(rwc->GetLayerTreeId());
   }
   mouse_lock_dispatcher_ = new RenderViewMouseLockDispatcher(this);
 
   history_controller_.reset(new HistoryController(this));
 
   new IdleUserDetector(this);
 
   if (command_line.HasSwitch(switches::kDomAutomationController))
@@ skipping 3410 matching lines @@
     std::vector<gfx::Size> sizes;
     ConvertToFaviconSizes(icon_urls[i].sizes(), &sizes);
     if (!url.isEmpty())
       urls.push_back(
           FaviconURL(url, ToFaviconType(icon_urls[i].iconType()), sizes));
   }
   SendUpdateFaviconURL(urls);
 }
 
 }  // namespace content