[DevTools] Scope common protocol infrastructure under Protocol namespace in a separate 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 73 matching lines @@
     },
 
     /**
      * @param {?number} firstStep
      * @param {?number} lastStep
      * @param {?number} scale
      * @param {function(string=)} callback
      */
     requestImage: function(firstStep, lastStep, scale, callback)
     {
-        var wrappedCallback = InspectorBackend.wrapClientCallback(callback, "LayerTreeAgent.replaySnapshot(): ");
+        var wrappedCallback = Protocol.wrapClientCallback(callback, "LayerTreeAgent.replaySnapshot(): ");
         this._target.layerTreeAgent().replaySnapshot(this._id, firstStep || undefined, lastStep || undefined, scale || 1.0, wrappedCallback);
     },
 
     /**
      * @param {?DOMAgent.Rect} clipRect
      * @param {function(!Array.<!LayerTreeAgent.PaintProfile>=)} callback
      */
     profile: function(clipRect, callback)
     {
-        var wrappedCallback = InspectorBackend.wrapClientCallback(callback, "LayerTreeAgent.profileSnapshot(): ");
+        var wrappedCallback = Protocol.wrapClientCallback(callback, "LayerTreeAgent.profileSnapshot(): ");
         this._target.layerTreeAgent().profileSnapshot(this._id, 5, 1, clipRect || undefined, wrappedCallback);
     },
 
     /**
      * @param {function(!Array.<!WebInspector.PaintProfilerLogItem>=)} callback
      */
     commandLog: function(callback)
     {
         /**
          * @param {?string} error
@@ skipping 23 matching lines @@
  * @constructor
  * @param {!WebInspector.RawPaintProfilerLogItem} rawEntry
  * @param {number} commandIndex
  */
 WebInspector.PaintProfilerLogItem = function(rawEntry, commandIndex)
 {
     this.method = rawEntry.method;
     this.params = rawEntry.params;
     this.commandIndex = commandIndex;
 };