DevTools: Do not linkify to pseudo (program) node when there's no URL

third_party/WebKit/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 978 matching lines @@
         var priority = WebInspector.uiLabelForPriority(/** @type {!NetworkAgent.ResourcePriority} */ (request.priority));
         contentHelper.appendTextRow(WebInspector.UIString("Priority"), priority);
     }
     if (request.mimeType)
         contentHelper.appendTextRow(WebInspector.UIString("Mime Type"), request.mimeType);
 
     var title = WebInspector.UIString("Initiator");
     var sendRequest = request.children[0];
     var topFrame = WebInspector.TimelineUIUtils.topStackFrame(sendRequest);
     if (topFrame) {
-        contentHelper.appendElementRow(title, linkifier.linkifyConsoleCallFrameForTimeline(target, topFrame));
+        var link = linkifier.linkifyConsoleCallFrameForTimeline(target, topFrame);
+        if (link)
+            contentHelper.appendElementRow(title, link);
     } else if (sendRequest.initiator) {
         var initiatorURL = WebInspector.TimelineUIUtils.eventURL(sendRequest.initiator);
-        if (initiatorURL)
-            contentHelper.appendElementRow(title, linkifier.linkifyScriptLocation(target, null, initiatorURL, 0));
+        if (initiatorURL) {
+            var link = linkifier.linkifyScriptLocation(target, null, initiatorURL, 0);
+            if (link)
+                contentHelper.appendElementRow(title, link);
+        }
     }
 
     /**
      * @param {function(?Element)} fulfill
      */
     function action(fulfill)
     {
         WebInspector.DOMPresentationUtils.buildImagePreviewContents(/** @type {!WebInspector.Target} */(target), request.url, false, saveImage);
         /**
          * @param {!Element=} element
@@ skipping 1030 matching lines @@
      * @param {string} url
      * @param {number} startLine
      * @param {number=} startColumn
      */
     appendLocationRow: function(title, url, startLine, startColumn)
     {
         if (!this._linkifier || !this._target)
             return;
         if (startColumn)
             --startColumn;
-        this.appendElementRow(title, this._linkifier.linkifyScriptLocation(this._target, null, url, startLine - 1, startColumn));
+        var link = this._linkifier.linkifyScriptLocation(this._target, null, url, startLine - 1, startColumn);
+        if (!link)
+            return;
+        this.appendElementRow(title, link);
     },
 
     /**
      * @param {string} title
      * @param {string} url
      * @param {number} startLine
      * @param {number=} endLine
      */
     appendLocationRange: function(title, url, startLine, endLine)
     {
@@ skipping 73 matching lines @@
     case warnings.V8Deopt:
         span.appendChild(WebInspector.linkifyURLAsNode("https://github.com/GoogleChrome/devtools-docs/issues/53",
             WebInspector.UIString("Not optimized"), undefined, true));
         span.createTextChild(WebInspector.UIString(": %s", eventData["deoptReason"]));
         break;
     default:
         console.assert(false, "Unhandled TimelineModel.WarningType");
     }
     return span;
 }