DevTools: extract modules (with extensions)

third_party/WebKit/Source/devtools/front_end/main/GCActionDelegate.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @implements {UI.ActionDelegate}
  */
-Components.GCActionDelegate = class {
+Main.GCActionDelegate = class {
   /**
    * @override
    * @param {!UI.Context} context
    * @param {string} actionId
    * @return {boolean}
    */
   handleAction(context, actionId) {
     SDK.targetManager.targets().forEach(target => target.heapProfilerAgent().collectGarbage());
     return true;
   }
 };