Change how the VR reticle distance is determined.

chrome/browser/resources/vr_shell/vr_shell_ui_api.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 var api = {};
 
 /**
  * Enumeration of scene update commands.
  * @enum {number}
  * @const
@@ skipping 304 matching lines @@
    * pixelHeight is width and height of the texture to be copied from the web
    * contents.
    * @param {number} pixelX
    * @param {number} pixelY
    * @param {number} pixelWidth
    * @param {number} pixelHeight
    */
   constructor(pixelX, pixelY, pixelWidth, pixelHeight) {
     super();
 
+    // Apply defaults to new elements.
+    this.setVisible(true);
+    this.setHitTestable(true);
     this.setFill(new api.Sprite(pixelX, pixelY, pixelWidth, pixelHeight));
   }
 };
 
 /**
  * Enumeration of animatable properties.
  * @enum {number}
  * @const
  */
 api.Property = {
@@ skipping 245 matching lines @@
     if ('updateTab' in dict) {
       this.onUpdateTab(dict['updateTabs']);
     }
     if ('removeTab' in dict) {
       this.onRemoveTab(dict['removeTab']);
     }
 
     this.onCommandHandlerFinished()
   }
 };