DevTools Timeline: expose HitTest event

Source/devtools/front_end/timeline/TimelineUIUtils.js

Index: Source/devtools/front_end/timeline/TimelineUIUtils.js
diff --git a/Source/devtools/front_end/timeline/TimelineUIUtils.js b/Source/devtools/front_end/timeline/TimelineUIUtils.js
index 0871b63ac1c9e3f32c082dad987fcfbe6071b35d..ffc4d1764e1a1aaf519096abe792c0b39b42bfb7 100644
--- a/Source/devtools/front_end/timeline/TimelineUIUtils.js
+++ b/Source/devtools/front_end/timeline/TimelineUIUtils.js
@@ -67,6 +67,7 @@ WebInspector.TimelineUIUtils._initEventStyles = function()
     eventStyles[recordTypes.BeginFrame] = new WebInspector.TimelineRecordStyle(WebInspector.UIString("Frame Start"), categories["rendering"], true);
     eventStyles[recordTypes.BeginMainThreadFrame] = new WebInspector.TimelineRecordStyle(WebInspector.UIString("Frame Start (main thread)"), categories["rendering"], true);
     eventStyles[recordTypes.DrawFrame] = new WebInspector.TimelineRecordStyle(WebInspector.UIString("Draw Frame"), categories["rendering"], true);
+    eventStyles[recordTypes.HitTest] = new WebInspector.TimelineRecordStyle(WebInspector.UIString("Hit Test"), categories["rendering"]);
     eventStyles[recordTypes.ScheduleStyleRecalculation] = new WebInspector.TimelineRecordStyle(WebInspector.UIString("Schedule Style Recalculation"), categories["rendering"], true);
     eventStyles[recordTypes.RecalculateStyles] = new WebInspector.TimelineRecordStyle(WebInspector.UIString("Recalculate Style"), categories["rendering"]);
     eventStyles[recordTypes.UpdateLayoutTree] = new WebInspector.TimelineRecordStyle(WebInspector.UIString("Recalculate Style"), categories["rendering"]);