DevTools: Make snippets renaming work through SnippetsProjectDelegate.

Source/devtools/front_end/SnippetStorage.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 59 matching lines @@
 
     /**
      * @param {string} id
      * @return {WebInspector.Snippet}
      */
     snippetForId: function(id)
     {
         return this._snippets[id];
     },
 
+    /**
+     * @param {string} name
+     * @return {WebInspector.Snippet}
+     */
+    snippetForName: function(name)
+    {
+        var snippets = Object.values(this._snippets);
+        for (var i = 0; i < snippets.length; ++i)
+            if (snippets[i].name === name)
+                return snippets[i];
+        return null;
+    },
+
     _loadSettings: function()
     {
         var savedSnippets = this._snippetsSetting.get();
         for (var i = 0; i < savedSnippets.length; ++i)
             this._snippetAdded(WebInspector.Snippet.fromObject(this, savedSnippets[i]));
     },
 
     /**
      * @param {WebInspector.Snippet} snippet
      */
@@ skipping 111 matching lines @@
     {
         var serializedSnippet = {};
         serializedSnippet.id = this.id;
         serializedSnippet.name = this.name;
         serializedSnippet.content = this.content;
         return serializedSnippet;
     },
 
     __proto__: WebInspector.Object.prototype
 }