DevTools: WI.Throttler goes promisified.

Source/devtools/front_end/elements/StylesSidebarPane.js

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 295 matching lines @@
             }
         }
 
         if (this._filterRegex)
             this._updateFilter();
         this._nodeStylesUpdatedForTest(node, false);
     },
 
     /**
      * @override
-     * @param {!WebInspector.Throttler.FinishCallback} finishedCallback
+     * @return {!Promise.<?>}
      */
-    doUpdate: function(finishedCallback)
+    doUpdate: function()
     {
         this._discardElementUnderMouse();
 
-        this.fetchMatchedCascade()
+        return this.fetchMatchedCascade()
             .then(this._innerRebuildUpdate.bind(this))
-            .then(finishedCallback)
-            .catch(/** @type {function()} */(finishedCallback));
     },
 
     _resetCache: function()
     {
         delete this._matchedCascadePromise;
     },
 
     /**
      * @return {!Promise.<?{matched: !WebInspector.SectionCascade, pseudo: !Map.<number, !WebInspector.SectionCascade>}>}
      */
@@ skipping 2461 matching lines @@
      * @param {boolean} majorChange
      */
     applyStyleText: function(styleText, majorChange)
     {
         this._applyStyleThrottler.schedule(this._innerApplyStyleText.bind(this, styleText, majorChange));
     },
 
     /**
      * @param {string} styleText
      * @param {boolean} majorChange
-     * @param {!WebInspector.Throttler.FinishCallback} finishedCallback
+     * @return {!Promise.<undefined>}
      */
-    _innerApplyStyleText: function(styleText, majorChange, finishedCallback)
+    _innerApplyStyleText: function(styleText, majorChange)
     {
-        if (!this.treeOutline) {
-            finishedCallback();
-            return;
-        }
+        if (!this.treeOutline)
+            return Promise.resolve();
 
         styleText = styleText.replace(/\s/g, " ").trim(); // Replace &nbsp; with whitespace.
         if (!styleText.length && majorChange && this._newProperty && !this._propertyHasBeenEditedIncrementally) {
             // The user deleted everything and never applied a new property value via Up/Down scrolling/live editing, so remove the tree element and update.
             var section = this.section();
             this.parent.removeChild(this);
             section.afterUpdate();
-            return;
+            return Promise.resolve();
         }
 
         var currentNode = this._parentPane.node();
         this._parentPane._userOperation = true;
 
         /**
          * @param {?WebInspector.CSSStyleDeclaration} newStyle
          * @this {WebInspector.StylePropertyTreeElement}
          */
         function callback(newStyle)
         {
             delete this._parentPane._userOperation;
 
             if (!newStyle) {
                 if (majorChange) {
                     // It did not apply, cancel editing.
                     this._revertStyleUponEditingCanceled();
                 }
-                finishedCallback();
                 this.styleTextAppliedForTest();
                 return;
             }
             this._applyNewStyle(newStyle);
 
             this._propertyHasBeenEditedIncrementally = true;
             this.property = newStyle.propertyAt(this.property.index);
 
             // We are happy to update UI if user is not editing.
             if (!this._parentPane._isEditingStyle && currentNode === this.node())
                 this._updatePane();
 
-            finishedCallback();
             this.styleTextAppliedForTest();
         }
 
         // Append a ";" if the new text does not end in ";".
         // FIXME: this does not handle trailing comments.
         if (styleText.length && !/;\s*$/.test(styleText))
             styleText += ";";
         var overwriteProperty = !this._newProperty || this._propertyHasBeenEditedIncrementally;
-        this.property.setText(styleText, majorChange, overwriteProperty)
-            .then(callback.bind(this))
-            .catch(/** @type {function()} */(finishedCallback));
+        return this.property.setText(styleText, majorChange, overwriteProperty)
+            .then(callback.bind(this));
     },
 
     /**
      * @override
      * @return {boolean}
      */
     ondblclick: function()
     {
         return true; // handled
     },
@@ skipping 372 matching lines @@
 
     /**
      * @override
      * @return {?WebInspector.ToolbarItem}
      */
     item: function()
     {
         return this._button;
     }
 }