DevTools: WI.Throttler goes promisified.

LayoutTests/http/tests/inspector/elements-test.js

 var initialize_ElementTest = function() {
 
 InspectorTest.preloadPanel("elements");
 
 InspectorTest.inlineStyleSection = function()
 {
     return WebInspector.panels.elements.sidebarPanes.styles._sectionBlocks[0].sections[0];
 }
 
 InspectorTest.computedStyleWidget = function()
@@ skipping 249 matching lines @@
     }
 }
 
 InspectorTest.selectNodeAndWaitForStylesWithComputed = function(idValue, callback)
 {
     callback = InspectorTest.safeWrap(callback);
     InspectorTest.selectNodeAndWaitForStyles(idValue, onSidebarRendered);
 
     function onSidebarRendered()
     {
-        InspectorTest.computedStyleWidget().doUpdate(callback);
+        InspectorTest.computedStyleWidget().doUpdate().then(callback);
     }
 }
 
 InspectorTest.firstElementsTreeOutline = function()
 {
     return WebInspector.panels.elements._treeOutlines[0];
 }
 
 InspectorTest.filterMatchedStyles = function(text)
 {
@@ skipping 713 matching lines @@
             for (var ui of nodeRow.animations) {
                 InspectorTest.addResult(ui.animation().type());
                 InspectorTest.addResult(ui._nameElement.outerHTML);
                 InspectorTest.addResult(ui._svg.outerHTML);
             }
         }
     }
 }
 
 };