DevTools: Implement console message logging through an extension

Source/devtools/front_end/sdk/IsolatedFileSystemManager.js

 /*
  * Copyright (C) 2012 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 110 matching lines @@
         delete this._pendingFileSystemRequests;
     },
 
     /**
      * @param {string} errorMessage
      * @param {!WebInspector.IsolatedFileSystemManager.FileSystem} fileSystem
      */
     _fileSystemAdded: function(errorMessage, fileSystem)
     {
         var fileSystemPath;
-        if (errorMessage)
-            WebInspector.console.showErrorMessage(errorMessage)
-        else if (fileSystem) {
+        if (errorMessage) {
+            WebInspector.messageSink.addErrorMessage(errorMessage, true);
+        } else {
             this._innerAddFileSystem(fileSystem);
             fileSystemPath = fileSystem.fileSystemPath;
         }
     },
 
     /**
      * @param {string} fileSystemPath
      */
     _fileSystemRemoved: function(fileSystemPath)
     {
@@ skipping 74 matching lines @@
     fileSystemAdded: function(errorMessage, fileSystem)
     {
         this._IsolatedFileSystemManager._fileSystemAdded(errorMessage, fileSystem);
     }
 }
 
 /**
  * @type {!WebInspector.IsolatedFileSystemDispatcher}
  */
 WebInspector.isolatedFileSystemDispatcher;