[DevTools] Make timeline popover easier to use on small screens

third_party/WebKit/Source/devtools/front_end/perf_ui/TimelineOverviewPane.js

 /*
  * Copyright (C) 2013 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 58 matching lines @@
    * @return {?UI.PopoverRequest}
    */
   _getPopoverRequest(event) {
     return {
       box: this._cursorElement.boxInWindow(),
       show: popover => this._buildPopoverContents().then(fragment => {
         if (!fragment.firstChild)
           return false;
         var content = new PerfUI.TimelineOverviewPane.PopoverContents();
         this._popoverContents = content.contentElement.createChild('div');
+        this._popoverContents.addEventListener('click', () => this._popoverHelper.hidePopover());
         this._popoverContents.appendChild(fragment);
         this._popover = popover;
         content.show(popover.contentElement);
         return true;
       }),
       hide: () => {
         this._popover = null;
         this._popoverContents = null;
       }
     };
@@ skipping 438 matching lines @@
    */
   onClick(event) {
     return false;
   }
 
   resetCanvas() {
     this._canvas.width = this.element.clientWidth * window.devicePixelRatio;
     this._canvas.height = this.element.clientHeight * window.devicePixelRatio;
   }
 };