DevTools: Make snippets renaming work through SnippetsProjectDelegate.

Source/devtools/front_end/SnippetStorage.js

Index: Source/devtools/front_end/SnippetStorage.js
diff --git a/Source/devtools/front_end/SnippetStorage.js b/Source/devtools/front_end/SnippetStorage.js
index 4bdc8736894c13eba99dcaec3c33631bcd862d5c..098a2542bfe689ab0384e103d006e46151d416b5 100644
--- a/Source/devtools/front_end/SnippetStorage.js
+++ b/Source/devtools/front_end/SnippetStorage.js
@@ -77,6 +77,19 @@ WebInspector.SnippetStorage.prototype = {
         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();