DevTools: Fix timeline overview flickering

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

 /*
  * Copyright (C) 2009 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 185 matching lines @@
     this._hidePopoverCallback = null;
   }
 
   /**
    * @param {!Document} document
    */
   _showPopover(document) {
     var popover = new UI.GlassPane();
     popover.registerRequiredCSS('ui/popover.css');
     popover.setSizeBehavior(UI.GlassPane.SizeBehavior.MeasureContent);
-    popover.setBlockPointerEvents(false);
     popover.setMarginBehavior(UI.GlassPane.MarginBehavior.Arrow);
     var request = this._scheduledRequest;
     request.show.call(null, popover).then(success => {
       if (!success)
         return;
 
       if (this._scheduledRequest !== request) {
         if (request.hide)
           request.hide.call(null);
         return;
@@ skipping 28 matching lines @@
     delete this._hidePopoverTimer;
 
     // We know that we reached the popup, but we might have moved over other elements.
     // Discard pending command.
     this._stopShowPopoverTimer();
   }
 };
 
 /** @typedef {{box: !AnchorBox, show:(function(!UI.GlassPane):!Promise<boolean>), hide:(function()|undefined)}} */
 UI.PopoverRequest;