DevTools: allow blackboxing anonymous scripts

Source/devtools/front_end/bindings/BlackboxSupport.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 WebInspector.BlackboxSupport = {}
 
 /**
  * @param {string} url
  * @return {string}
  */
 WebInspector.BlackboxSupport._urlToRegExpString = function(url)
 {
     var parsedURL = new WebInspector.ParsedURL(url);
-    if (parsedURL.isAboutBlank() || parsedURL.isDataURL() || !url)
+    if (parsedURL.isAboutBlank() || parsedURL.isDataURL())
         return "";
     if (!parsedURL.isValid)
         return "^" + url.escapeForRegExp() + "$";
     var name = parsedURL.lastPathComponent;
     if (name)
         name = "/" + name;
     else if (parsedURL.folderPathComponents)
         name = parsedURL.folderPathComponents + "/";
     if (!name)
         name = parsedURL.host;
@@ skipping 72 matching lines @@
     WebInspector.moduleSetting("skipStackFramesPattern").setAsArray(regexPatterns);
 }
 
 /**
  * @param {string} url
  * @return {boolean}
  */
 WebInspector.BlackboxSupport.isBlackboxedURL = function(url)
 {
     var regex = WebInspector.moduleSetting("skipStackFramesPattern").asRegExp();
-    return (url && regex) ? regex.test(url) : false;
+    return regex && regex.test(url);
 }
 
 /**
  * @param {string} url
  * @param {boolean} isContentScript
  * @return {boolean}
  */
 WebInspector.BlackboxSupport.isBlackboxed = function(url, isContentScript)
 {
     if (isContentScript && WebInspector.moduleSetting("skipContentScripts").get())
@@ skipping 11 matching lines @@
 }
 
 /**
  * @param {function(!WebInspector.Event)} listener
  * @param {!Object=} thisObject
  */
 WebInspector.BlackboxSupport.removeChangeListener = function(listener, thisObject)
 {
     WebInspector.moduleSetting("skipStackFramesPattern").removeChangeListener(listener, thisObject);
 }