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

third_party/WebKit/Source/devtools/front_end/extensions/ExtensionServer.js

Index: third_party/WebKit/Source/devtools/front_end/extensions/ExtensionServer.js
diff --git a/third_party/WebKit/Source/devtools/front_end/extensions/ExtensionServer.js b/third_party/WebKit/Source/devtools/front_end/extensions/ExtensionServer.js
index a56bdb62449785b25b1ea490b8b5386a717be7f6..4ac4041899686f5836cd0a046706b430c48e9e9e 100644
--- a/third_party/WebKit/Source/devtools/front_end/extensions/ExtensionServer.js
+++ b/third_party/WebKit/Source/devtools/front_end/extensions/ExtensionServer.js
@@ -477,26 +477,27 @@ WebInspector.ExtensionServer.prototype = {
     },
 
     /**
-     * @return {!Array.<!WebInspector.ContentProvider>}
+     * @return {!Array<!WebInspector.ContentProvider>}
      */
     _onGetPageResources: function()
     {
-        var resources = {};
+        /** @type {!Map<string, !WebInspector.ContentProvider>} */
+        var resources = new Map();
 
         /**
          * @this {WebInspector.ExtensionServer}
          */
         function pushResourceData(contentProvider)
         {
-            if (!resources[contentProvider.contentURL()])
-                resources[contentProvider.contentURL()] = this._makeResource(contentProvider);
+            if (!resources.has(contentProvider.contentURL()))
+                resources.set(contentProvider.contentURL(), this._makeResource(contentProvider));
         }
         var uiSourceCodes = WebInspector.workspace.uiSourceCodesForProjectType(WebInspector.projectTypes.Network);
         uiSourceCodes = uiSourceCodes.concat(WebInspector.workspace.uiSourceCodesForProjectType(WebInspector.projectTypes.ContentScripts));
         uiSourceCodes.forEach(pushResourceData.bind(this));
         for (var target of WebInspector.targetManager.targets())
             target.resourceTreeModel.forAllResources(pushResourceData.bind(this));
-        return Object.values(resources);
+        return resources.valuesArray();
     },
 
     /**