Introduce InspectorFrontendHost.sendMessageToFrontendHost.

Source/devtools/front_end/InspectorFrontendHostStub.js

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 164 matching lines @@
         {
             window.URL.revokeObjectURL(objectUrl);
         }
         setTimeout(cleanup, 3000);
     },
 
     sendMessageToBackend: function(message)
     {
     },
 
+    sendMessageToFrontendHost: function(message)
+    {
+    },
+
     recordActionTaken: function(actionCode)
     {
     },
 
     recordPanelShown: function(panelCode)
     {
     },
 
     recordSettingChanged: function(settingCode)
     {
@@ skipping 82 matching lines @@
     p.addStyleClass("help-section");
     p.createChild("span").textContent = "Remote debugging has been terminated with reason: ";
     p.createChild("span", "error-message").textContent = reason;
     p.createChild("br");
     p.createChild("span").textContent = "Please re-attach to the new target.";
 }
 
 WebInspector.RemoteDebuggingTerminatedScreen.prototype = {
     __proto__: WebInspector.HelpScreen.prototype
 }