[DevTools] Migrate Popover to GlassPane

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 94 matching lines @@
    */
   _onMouseMove(event) {
     if (!this._cursorEnabled)
       return;
     this._cursorPosition = event.offsetX + event.target.offsetLeft;
     this._cursorElement.style.left = this._cursorPosition + 'px';
     this._cursorElement.style.visibility = 'visible';
     if (!this._popover)
       return;
     this._buildPopoverContents().then(updatePopover.bind(this));
-    this._popover.positionElement(this._cursorElement);
+    this._popover.setContentAnchorBox(this._cursorElement.boxInWindow());
 
     /**
      * @param {!DocumentFragment} fragment
      * @this {PerfUI.TimelineOverviewPane}
      */
     function updatePopover(fragment) {
       if (!this._popoverContents)
         return;
       this._popoverContents.removeChildren();
       this._popoverContents.appendChild(fragment);
@@ skipping 413 matching lines @@
    */
   onClick(event) {
     return false;
   }
 
   resetCanvas() {
     this._canvas.width = this.element.clientWidth * window.devicePixelRatio;
     this._canvas.height = this.element.clientHeight * window.devicePixelRatio;
   }
 };