DevTools: Only provide static script content to UISourceCode

third_party/WebKit/Source/devtools/front_end/snippets/ScriptSnippetModel.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 565 matching lines @@
    * @param {string} newContent
    * @param {function(?string)} callback
    */
   setFileContent(uiSourceCode, newContent, callback) {
     this._model._setScriptSnippetContent(uiSourceCode.url(), newContent);
     callback('');
   }
 
   /**
    * @override
+   * @param {!Workspace.UISourceCode} uiSourceCode
+   * @return {!Promise<?string>}
+   */
+  requestOriginalFileContent(uiSourceCode) {
+    return Promise.resolve(/** @type {?string} **/ (null));
+  }
+
+  /**
+   * @override
    * @return {boolean}
    */
   canRename() {
     return true;
   }
 
   /**
    * @override
    * @param {string} url
    * @param {string} newName
@@ skipping 20 matching lines @@
    */
   deleteFile(url) {
     this._model.deleteScriptSnippet(url);
   }
 };
 
 /**
  * @type {!Snippets.ScriptSnippetModel}
  */
 Snippets.scriptSnippetModel = new Snippets.ScriptSnippetModel(Workspace.workspace);