Timeline: promisify paint profiler and Layers panel, part I

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 29 matching lines @@
  */
 WebInspector.PaintProfilerSnapshot = function(target, snapshotId)
 {
     this._target = target;
     this._id = snapshotId;
 }
 
 /**
  * @param {!WebInspector.Target} target
  * @param {!Array.<!WebInspector.PictureFragment>} fragments
- * @param {function(?WebInspector.PaintProfilerSnapshot)} callback
+ * @return {!Promise<?WebInspector.PaintProfilerSnapshot>}
  */
-WebInspector.PaintProfilerSnapshot.loadFromFragments = function(target, fragments, callback)
+WebInspector.PaintProfilerSnapshot.loadFromFragments = function(target, fragments)
 {
-    var wrappedCallback = InspectorBackend.wrapClientCallback(callback, "LayerTreeAgent.loadSnapshot(): ", WebInspector.PaintProfilerSnapshot.bind(null, target));
-    target.layerTreeAgent().loadSnapshot(fragments, wrappedCallback);
+    return target.layerTreeAgent().loadSnapshot(fragments, (error, snapshotId) => error ? null : new WebInspector.PaintProfilerSnapshot(target, snapshotId));
 }
 
 /**
  * @param {!WebInspector.Target} target
  * @param {string} encodedPicture
- * @param {function(?WebInspector.PaintProfilerSnapshot)} callback
+ * @return {!Promise<?WebInspector.PaintProfilerSnapshot>}
  */
-WebInspector.PaintProfilerSnapshot.load = function(target, encodedPicture, callback)
+WebInspector.PaintProfilerSnapshot.load = function(target, encodedPicture)
 {
     var fragment = {
         x: 0,
         y: 0,
         picture: encodedPicture
     };
-    WebInspector.PaintProfilerSnapshot.loadFromFragments(target, [fragment], callback);
+    return WebInspector.PaintProfilerSnapshot.loadFromFragments(target, [fragment]);
 }
 
 WebInspector.PaintProfilerSnapshot.prototype = {
     dispose: function()
     {
         this._target.layerTreeAgent().releaseSnapshot(this._id);
     },
 
     /**
      * @return {!WebInspector.Target}
@@ skipping 58 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;
 }