[DevTools] Fix location.script().sourceURL

third_party/WebKit/Source/devtools/front_end/bindings/BlackboxManager.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.
 
 /**
  * @constructor
  * @param {!WebInspector.DebuggerWorkspaceBinding} debuggerWorkspaceBinding
  * @param {!WebInspector.NetworkMapping} networkMapping
  * @implements {WebInspector.TargetManager.Observer}
  */
@@ skipping 67 matching lines @@
         }
         return debuggerModel.setBlackboxPatterns(patterns);
     },
 
     /**
      * @param {!WebInspector.DebuggerModel.Location} location
      * @return {boolean}
      */
     isBlackboxedRawLocation: function(location)
     {
-        var positions = this._scriptPositions(location.script());
+        var script = location.script();
+        if (!script)
+            return false;
+        var positions = this._scriptPositions(script);
         if (!positions)
-            return this._isBlackboxedScript(location.script());
+            return this._isBlackboxedScript(script);
         var index = positions.lowerBound(location, comparator);
         return !!(index % 2);
 
         /**
          * @param {!WebInspector.DebuggerModel.Location} a
          * @param {!DebuggerAgent.ScriptPosition} b
          * @return {number}
          */
         function comparator(a, b)
         {
@@ skipping 349 matching lines @@
             if (scheme === "chrome-extension")
                 prefix += parsedURL.host + "\\b";
             prefix += ".*";
         }
         return prefix + name.escapeForRegExp() + (url.endsWith(name) ? "$" : "\\b");
     }
 }
 
 /** @type {!WebInspector.BlackboxManager} */
 WebInspector.blackboxManager;