Add passive and FOV-locked properties to UI elements.

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 = (function() {
   'use strict';
 
   /**
    * Enumeration of scene update commands.
    * @enum {number}
@@ skipping 145 matching lines @@
       this.xAnchoring = x;
       this.yAnchoring = y;
     }
 
     /**
      * Visibility controls whether the element is rendered.
      */
     setVisible(visible) {
       this.visible = !!visible;
     }
+
+    /**
+     * Hit-testable implies that the reticle will hit the element, if visible.
+     */
+    setHitTestable(testable) {
+      this.hitTestable = !!testable;
+    }
+
+    /**
+     * Causes an element to be rendered relative to the field of view, rather
+     * than the scene.  Elements locked in this way should not have a parent.
+     */
+    setLockToFieldOfView(locked) {
+      this.lockToFov = !!locked;
+    }
   };
 
   /**
    * Represents a new UI element. This object builds on UiElementUpdate,
    * forcing the underlying texture coordinates to be specified.
    */
   class UiElement extends UiElementUpdate {
     /**
      * Constructor of UiElement.
      * pixelX and pixelY values indicate the left upper corner; pixelWidth and
@@ skipping 105 matching lines @@
     Action: Action,
     Mode: Mode,
     getContentElementId: getContentElementId,
     UiElement: UiElement,
     UiElementUpdate: UiElementUpdate,
     Animation: Animation,
     doAction: doAction,
     domLoaded: domLoaded,
   };
 })();