DevTools: Make target on TimelineRecord nullable

Source/devtools/front_end/timeline/TimelineUIUtils.js

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel 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.
@@ skipping 84 matching lines @@
      * @param {!WebInspector.TimelineModel.Record} record
      * @return {!WebInspector.TimelineCategory}
      */
     categoryForRecord: function(record)
     {
         throw new Error("Not implemented.");
     },
     /**
      * @param {!WebInspector.TimelineModel.Record} record
      * @param {!WebInspector.Linkifier} linkifier
-     * @param {boolean} loadedFromFile
      * @return {?Node}
      */
-    buildDetailsNode: function(record, linkifier, loadedFromFile)
+    buildDetailsNode: function(record, linkifier)
     {
         throw new Error("Not implemented.");
     },
     /**
      * @param {!WebInspector.TimelineModel.Record} record
      * @param {!WebInspector.TimelineModel} model
      * @param {!WebInspector.Linkifier} linkifier
      * @param {function(!DocumentFragment)} callback
-     * @param {boolean} loadedFromFile
      */
-    generateDetailsContent: function(record, model, linkifier, callback, loadedFromFile)
+    generateDetailsContent: function(record, model, linkifier, callback)
     {
         throw new Error("Not implemented.");
     },
     /**
      * @return {!Element}
      */
     createBeginFrameDivider: function()
     {
         throw new Error("Not implemented.");
     },
@@ skipping 439 matching lines @@
         for (var i = 0; i < stackTrace.length; ++i) {
             var stackFrame = stackTrace[i];
             var row = stackTraceElement.createChild("div");
             row.createTextChild(stackFrame.functionName || WebInspector.UIString("(anonymous function)"));
             row.createTextChild(" @ ");
             var urlElement = this._linkifier.linkifyLocationByScriptId(this._target, stackFrame.scriptId, stackFrame.url, stackFrame.lineNumber - 1, stackFrame.columnNumber - 1);
             row.appendChild(urlElement);
         }
     }
 }