[DevTools] Fix location.script().sourceURL

third_party/WebKit/Source/devtools/front_end/bindings/CompilerScriptMapping.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 92 matching lines @@
             return new WebInspector.UILocation(stubUISourceCode, rawLocation.lineNumber, rawLocation.columnNumber);
 
         var sourceMap = this._sourceMapForScriptId.get(debuggerModelLocation.scriptId);
         if (!sourceMap)
             return null;
         var lineNumber = debuggerModelLocation.lineNumber;
         var columnNumber = debuggerModelLocation.columnNumber || 0;
         var entry = sourceMap.findEntry(lineNumber, columnNumber);
         if (!entry || !entry.sourceURL)
             return null;
-        var uiSourceCode = this._networkMapping.uiSourceCodeForScriptURL(/** @type {string} */ (entry.sourceURL), rawLocation.script());
+        var script = rawLocation.script();
+        if (!script)
+            return null;
+        var uiSourceCode = this._networkMapping.uiSourceCodeForScriptURL(/** @type {string} */ (entry.sourceURL), script);
         if (!uiSourceCode)
             return null;
         return uiSourceCode.uiLocation(/** @type {number} */ (entry.sourceLineNumber), /** @type {number} */ (entry.sourceColumnNumber));
     },
 
     /**
      * @override
      * @param {!WebInspector.UISourceCode} uiSourceCode
      * @param {number} lineNumber
      * @param {number} columnNumber
@@ skipping 258 matching lines @@
         this._sourceMapForScriptId.clear()
         this._scriptForSourceMap.clear();
         this._sourceMapForURL.clear();
     },
 
     dispose: function()
     {
         this._workspace.removeEventListener(WebInspector.Workspace.Events.UISourceCodeAdded, this._uiSourceCodeAddedToWorkspace, this);
     }
 }