DevTools: extract protocol module

third_party/WebKit/Source/devtools/front_end/sdk/PaintProfiler.js

 /*
  * Copyright (C) 2013 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 82 matching lines @@
   replay(firstStep, lastStep, scale) {
     return this._target.layerTreeAgent().replaySnapshot(
         this._id, firstStep || undefined, lastStep || undefined, scale || 1.0, (error, str) => error ? null : str);
   }
 
   /**
    * @param {?Protocol.DOM.Rect} clipRect
    * @param {function(!Array.<!Protocol.LayerTree.PaintProfile>=)} callback
    */
   profile(clipRect, callback) {
-    var wrappedCallback = InspectorBackend.wrapClientCallback(callback, 'Protocol.LayerTree.profileSnapshot(): ');
+    var wrappedCallback =
+        Protocol.inspectorBackend.wrapClientCallback(callback, 'Protocol.LayerTree.profileSnapshot(): ');
     this._target.layerTreeAgent().profileSnapshot(this._id, 5, 1, clipRect || undefined, wrappedCallback);
   }
 
   /**
    * @return {!Promise<?Array<!SDK.PaintProfilerLogItem>>}
    */
   commandLog() {
     return this._target.layerTreeAgent().snapshotCommandLog(this._id, processLog);
 
     /**
@@ skipping 23 matching lines @@
   /**
    * @param {!SDK.RawPaintProfilerLogItem} rawEntry
    * @param {number} commandIndex
    */
   constructor(rawEntry, commandIndex) {
     this.method = rawEntry.method;
     this.params = rawEntry.params;
     this.commandIndex = commandIndex;
   }
 };