[DevTools] Fix location.script().sourceURL

third_party/WebKit/Source/devtools/front_end/bindings/ResourceScriptMapping.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 46 matching lines @@
 WebInspector.ResourceScriptMapping.prototype = {
     /**
      * @override
      * @param {!WebInspector.DebuggerModel.Location} rawLocation
      * @return {?WebInspector.UILocation}
      */
     rawLocationToUILocation: function(rawLocation)
     {
         var debuggerModelLocation = /** @type {!WebInspector.DebuggerModel.Location} */ (rawLocation);
         var script = debuggerModelLocation.script();
+        if (!script)
+            return null;
         var uiSourceCode = this._workspaceUISourceCodeForScript(script);
         if (!uiSourceCode)
             return null;
         var scriptFile = this.scriptFile(uiSourceCode);
         if (scriptFile && ((scriptFile.hasDivergedFromVM() && !scriptFile.isMergingToVM()) || scriptFile.isDivergingFromVM()))
             return null;
         var lineNumber = debuggerModelLocation.lineNumber - (script.isInlineScriptWithSourceURL() ? script.lineOffset : 0);
         var columnNumber = debuggerModelLocation.columnNumber || 0;
         if (script.isInlineScriptWithSourceURL() && !lineNumber && columnNumber)
             columnNumber -= script.columnOffset;
@@ skipping 402 matching lines @@
     /**
      * @return {boolean}
      */
     hasSourceMapURL: function()
     {
         return this._script && !!this._script.sourceMapURL;
     },
 
     __proto__: WebInspector.Object.prototype
 }