Revert of DevTools: launch What's New from experiments

third_party/WebKit/Source/devtools/front_end/help/Help.js

 // Copyright 2017 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.
 
 /**
  * @return {!Help.ReleaseNote}
  */
 Help.latestReleaseNote = function() {
   if (!Help._latestReleaseNote) {
     /** @type {!Help.ReleaseNote} */
@@ skipping 15 matching lines @@
 
 Help.showReleaseNoteIfNeeded = function() {
   Help._showReleaseNoteIfNeeded(Help.releaseNoteVersionSetting().get(), Help.latestReleaseNote().version);
 };
 
 /**
  * @param {number} lastSeenVersion
  * @param {number} latestVersion
  */
 Help._showReleaseNoteIfNeeded = function(lastSeenVersion, latestVersion) {
+  if (!Runtime.experiments.isEnabled('releaseNote'))
+    return;
   if (lastSeenVersion >= latestVersion)
     return;
   Help.releaseNoteVersionSetting().set(latestVersion);
   UI.viewManager.showView(Help._releaseNoteViewId, true);
 };
 
 /**
  * @return {number}
  */
 Help.browserVersion = function() {
@@ skipping 19 matching lines @@
 Help.ReleaseNoteHighlightContent;
 
 /** @typedef {!{contents: !Array<!Help.ReleaseNoteHighlightContent>, featured: (boolean | undefined)}} */
 Help.ReleaseNoteHighlight;
 
 /**
  * @typedef {!{version: number, highlights: !Array<!Help.ReleaseNoteHighlight>,
  *    link: string, image: !Help.ReleaseNoteImage}}
  */
 Help.ReleaseNote;