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

third_party/WebKit/Source/devtools/front_end/snippets/ScriptSnippetModel.js

Index: third_party/WebKit/Source/devtools/front_end/snippets/ScriptSnippetModel.js
diff --git a/third_party/WebKit/Source/devtools/front_end/snippets/ScriptSnippetModel.js b/third_party/WebKit/Source/devtools/front_end/snippets/ScriptSnippetModel.js
index 77d057e14dd0b266b64ab3cc7ff0450debfa61d8..fbc5bdd947882018ceaf194af6061a3ab30f17de 100644
--- a/third_party/WebKit/Source/devtools/front_end/snippets/ScriptSnippetModel.js
+++ b/third_party/WebKit/Source/devtools/front_end/snippets/ScriptSnippetModel.js
@@ -96,9 +96,8 @@ WebInspector.ScriptSnippetModel.prototype = {
 
     _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);
     },
 
     /**
@@ -146,6 +145,8 @@ WebInspector.ScriptSnippetModel.prototype = {
             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);