DevTools: Implement console message logging through an extension

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 109 matching lines @@
     {
     },
 
     inspectedURLChanged: function(url)
     {
         document.title = WebInspector.UIString("Developer Tools - %s", url);
     },
 
     copyText: function(text)
     {
-        WebInspector.console.log("Clipboard is not enabled in hosted mode. Please inspect using chrome://inspect", WebInspector.ConsoleMessage.MessageLevel.Error, true);
+        WebInspector.messageSink.addErrorMessage("Clipboard is not enabled in hosted mode. Please inspect using chrome://inspect", true);
     },
 
     openInNewTab: function(url)
     {
         window.open(url, "_blank");
     },
 
     save: function(url, content, forceSaveAs)
     {
-        WebInspector.console.log("Saving files is not enabled in hosted mode. Please inspect using chrome://inspect", WebInspector.ConsoleMessage.MessageLevel.Error, true);
+        WebInspector.messageSink.addErrorMessage("Saving files is not enabled in hosted mode. Please inspect using chrome://inspect", true);
         WebInspector.fileManager.canceledSaveURL(url);
     },
 
     append: function(url, content)
     {
-        WebInspector.console.log("Saving files is not enabled in hosted mode. Please inspect using chrome://inspect", WebInspector.ConsoleMessage.MessageLevel.Error, true);
+        WebInspector.messageSink.addErrorMessage("Saving files is not enabled in hosted mode. Please inspect using chrome://inspect", true);
     },
 
     sendMessageToBackend: function(message)
     {
     },
 
     sendMessageToEmbedder: function(message)
     {
     },
 
@@ skipping 110 matching lines @@
 if (!window.InspectorFrontendHost) {
     InspectorFrontendHost = new WebInspector.InspectorFrontendHostStub();
 } else {
     var proto = WebInspector.InspectorFrontendHostStub.prototype;
     for (var name in proto) {
         var value = proto[name];
         if (typeof value !== "function" || InspectorFrontendHost[name])
             continue;
         InspectorFrontendHost[name] = function(name) {
             var message = "Incompatible embedder: method InspectorFrontendHost." + name + " is missing. Using stub instead.";
-            if (WebInspector.console)
-                WebInspector.console.showErrorMessage(message);
-            else
-                console.error(message);
+            WebInspector.messageSink.addErrorMessage(message, true);
             var args = Array.prototype.slice.call(arguments, 1);
             return proto[name].apply(InspectorFrontendHost, args);
         }.bind(null, name);
     }
 }