[DevTools] Scope common protocol infrastructure under Protocol namespace in a separate module.

third_party/WebKit/Source/devtools/front_end/layers/LayerTreeModel.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 419 matching lines @@
      * @override
      * @param {function(!Array.<string>)} callback
      */
     requestCompositingReasons: function(callback)
     {
         if (!this._target) {
             callback([]);
             return;
         }
 
-        var wrappedCallback = InspectorBackend.wrapClientCallback(callback, "LayerTreeAgent.reasonsForCompositingLayer(): ", undefined, []);
+        var wrappedCallback = Protocol.wrapClientCallback(callback, "LayerTreeAgent.reasonsForCompositingLayer(): ", undefined, []);
         this._target.layerTreeAgent().compositingReasons(this.id(), wrappedCallback);
     },
 
     /**
      * @override
      * @return {boolean}
      */
     drawsContent: function()
     {
         return this._layerPayload.drawsContent;
@@ skipping 15 matching lines @@
     /**
      * @param {function(!WebInspector.PaintProfilerSnapshot=)} callback
      */
     requestSnapshot: function(callback)
     {
         if (!this._target) {
             callback();
             return;
         }
 
-        var wrappedCallback = InspectorBackend.wrapClientCallback(callback, "LayerTreeAgent.makeSnapshot(): ", WebInspector.PaintProfilerSnapshot.bind(null, this._target));
+        var wrappedCallback = Protocol.wrapClientCallback(callback, "LayerTreeAgent.makeSnapshot(): ", WebInspector.PaintProfilerSnapshot.bind(null, this._target));
         this._target.layerTreeAgent().makeSnapshot(this.id(), wrappedCallback);
     },
 
     /**
      * @param {!DOMAgent.Rect} rect
      */
     _didPaint: function(rect)
     {
         this._lastPaintRect = rect;
         this._paintCount = this.paintCount() + 1;
@@ skipping 116 matching lines @@
 WebInspector.LayerTreeModel.fromTarget = function(target)
 {
     if (!target.hasDOMCapability())
         return null;
 
     var model = /** @type {?WebInspector.LayerTreeModel} */ (target.model(WebInspector.LayerTreeModel));
     if (!model)
         model = new WebInspector.LayerTreeModel(target);
     return model;
 };