[DevTools] Remove Object.values and Object.isEmpty from utilities.js

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 78 matching lines @@
     /**
      * @return {!WebInspector.Project}
      */
     project: function()
     {
         return this._project;
     },
 
     _loadSnippets: function()
     {
-        var snippets = this._snippetStorage.snippets();
-        for (var i = 0; i < snippets.length; ++i)
-            this._addScriptSnippet(snippets[i]);
+        for (var snippet of this._snippetStorage.snippets())
+            this._addScriptSnippet(snippet);
     },
 
     /**
      * @param {string} content
      * @return {!WebInspector.UISourceCode}
      */
     createScriptSnippet: function(content)
     {
         var snippet = this._snippetStorage.createSnippet();
         snippet.content = content;
@@ skipping 27 matching lines @@
     /**
      * @param {string} url
      */
     deleteScriptSnippet: function(url)
     {
         var uiSourceCode = this._project.uiSourceCodeForURL(url);
         if (!uiSourceCode)
             return;
         var snippetId = this._snippetIdForUISourceCode.get(uiSourceCode) || "";
         var snippet = this._snippetStorage.snippetForId(snippetId);
+        if (!snippet)
+            return;
         this._snippetStorage.deleteSnippet(snippet);
         this._removeBreakpoints(uiSourceCode);
         this._releaseSnippetScript(uiSourceCode);
         delete this._uiSourceCodeForSnippetId[snippet.id];
         this._snippetIdForUISourceCode.remove(uiSourceCode);
         this._project.removeFile(snippet.name);
     },
 
     /**
      * @param {string} name
@@ skipping 508 matching lines @@
         this._model.deleteScriptSnippet(url);
     },
 
     __proto__: WebInspector.ContentProviderBasedProject.prototype
 }
 
 /**
  * @type {!WebInspector.ScriptSnippetModel}
  */
 WebInspector.scriptSnippetModel = new WebInspector.ScriptSnippetModel(WebInspector.workspace);