DevTools: Fix timeline overview flickering

third_party/WebKit/Source/devtools/front_end/ui/SoftContextMenu.js

 /*
  * Copyright (C) 2011 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 31 matching lines @@
    * @param {!Document} document
    * @param {!AnchorBox} anchorBox
    */
   show(document, anchorBox) {
     if (!this._items.length)
       return;
 
     this._document = document;
 
     this._glassPane = new UI.GlassPane();
-    this._glassPane.setBlockPointerEvents(!this._parentMenu);
+    this._glassPane.setPointerEventsBehavior(
+        this._parentMenu ? UI.GlassPane.PointerEventsBehavior.PierceGlassPane :
+                           UI.GlassPane.PointerEventsBehavior.BlockedByGlassPane);
     this._glassPane.registerRequiredCSS('ui/softContextMenu.css');
     this._glassPane.setContentAnchorBox(anchorBox);
     this._glassPane.setSizeBehavior(UI.GlassPane.SizeBehavior.MeasureContent);
     this._glassPane.setMarginBehavior(UI.GlassPane.MarginBehavior.NoMargin);
     this._glassPane.setAnchorBehavior(
         this._parentMenu ? UI.GlassPane.AnchorBehavior.PreferRight : UI.GlassPane.AnchorBehavior.PreferBottom);
 
     this._contextMenuElement = this._glassPane.contentElement.createChild('div', 'soft-context-menu');
     this._contextMenuElement.tabIndex = 0;
     this._contextMenuElement.addEventListener('mouseup', e => e.consume(), false);
@@ skipping 248 matching lines @@
       case ' ':  // Space
         if (this._highlightedMenuItemElement)
           this._triggerAction(this._highlightedMenuItemElement, event);
         if (this._highlightedMenuItemElement._subItems)
           this._subMenu._highlightNext();
         break;
     }
     event.consume(true);
   }
 };