DevTools: implement release note behind an experiment

third_party/WebKit/Source/devtools/front_end/externs.js

 /*
  * Copyright (C) 2011 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 41 matching lines @@
 
 /** @type {number} */
 MouseEvent.prototype.movementY;
 
 /**
  * @type {number}
  */
 KeyboardEvent.DOM_KEY_LOCATION_NUMPAD;
 
 /**
+ * @constructor
+ */
+function IntersectionObserverEntry() {
+}
+
+/** @type {number} */
+IntersectionObserverEntry.prototype.time;
+
+/** @type {{top: number, right: number, bottom: number, left: number,
+     height: number, width: number}} */
+IntersectionObserverEntry.prototype.rootBounds;
+
+/** @type {!{top: number, right: number, bottom: number, left: number,
+ *     height: number, width: number}} */
+IntersectionObserverEntry.prototype.boundingClientRect;
+
+/** @type {!{top: number, right: number, bottom: number, left: number,
+ *     height: number, width: number}} */
+IntersectionObserverEntry.prototype.intersectionRect;
+
+/** @type {number} */
+IntersectionObserverEntry.prototype.intersectionRatio;
+
+/** @type {!Element} */
+IntersectionObserverEntry.prototype.target;
+
+/**
+ * @typedef {{threshold: (!Array<number>|number|undefined), root: (!Element|undefined), rootMargin: (string|undefined)}}
+ */
+var IntersectionObserverInit;
+
+/**
+ * @param {function(!Array<!IntersectionObserverEntry>)} handler
+ * @param {!IntersectionObserverInit=} options
+ * @constructor
+ */
+function IntersectionObserver(handler, options) {
+}
+
+/** @type {?Element} */
+IntersectionObserver.prototype.root;
+
+/** @type {!string} */
+IntersectionObserver.prototype.rootMargin;
+
+/** @type {!Array<!number>} */
+IntersectionObserver.prototype.thresholds;
+
+/**
+ * @param {!Element} element
+ */
+IntersectionObserver.prototype.observe = function(element) {};
+
+/**
+ * @param {!Element} element
+ */
+IntersectionObserver.prototype.unobserve = function(element) {};
+
+IntersectionObserver.prototype.disconnect = function() {};
+
+/**
+ * @return {!Array.<!IntersectionObserverEntry>}

[luoe, 2017/02/11 00:30:54]

nit: remove dot

+ */
+IntersectionObserver.prototype.takeRecords = function() {};
+
+/**
  * @param {!T} value
  * @param {boolean=} onlyFirst
  * @this {Array.<T>}
  * @template T
  */
 Array.prototype.remove = function(value, onlyFirst) {};
 /**
  * @param {!Array.<!T>} array
  * @this {Array.<!T>}
  * @template T
@@ skipping 782 matching lines @@
 var Extensions = {};
 /** @type {!Object} */
 var EventListeners = {};
 /** @type {!Object} */
 var FormatterWorker = {};
 /** @type {!Object} */
 var HeapSnapshotModel = {};
 /** @type {!Object} */
 var HeapSnapshotWorker = {};
 /** @type {!Object} */
+var Help = {};
+/** @type {!Object} */
 var Host = {};
 /** @type {!Object} */
 var InlineEditor = {};
 /** @type {!Object} */
 var LayerViewer = {};
 /** @type {!Object} */
 var Layers = {};
 /** @type {!Object} */
 var Main = {};
 /** @type {!Object} */
@@ skipping 45 matching lines @@
 /** @type {!Object} */
 var ToolboxBootstrap = {};
 /** @type {!Object} */
 var UI = {};
 /** @type {!Object} */
 var UtilitySharedWorker = {};
 /** @type {!Object} */
 var WorkerService = {};
 /** @type {!Object} */
 var Workspace = {};