DevTools: implement release note behind an experiment

third_party/WebKit/Source/devtools/front_end/main/Main.js

Index: third_party/WebKit/Source/devtools/front_end/main/Main.js
diff --git a/third_party/WebKit/Source/devtools/front_end/main/Main.js b/third_party/WebKit/Source/devtools/front_end/main/Main.js
index 22e209dc08a5449338d2861daeca16b94d6b55c2..3971886a29c201b9445eaa33a71c15a7143bd49e 100644
--- a/third_party/WebKit/Source/devtools/front_end/main/Main.js
+++ b/third_party/WebKit/Source/devtools/front_end/main/Main.js
@@ -107,6 +107,7 @@ Main.Main = class {
     Runtime.experiments.register('objectPreviews', 'Object previews', true);
     Runtime.experiments.register('persistence2', 'Persistence 2.0');
     Runtime.experiments.register('persistenceValidation', 'Validate persistence bindings');
+    Runtime.experiments.register('releaseNote', 'Release note', true);
     Runtime.experiments.register('requestBlocking', 'Request blocking', true);
     Runtime.experiments.register('timelineShowAllEvents', 'Show all events on Timeline', true);
     Runtime.experiments.register('timelineShowAllProcesses', 'Show all processes on Timeline', true);
@@ -130,6 +131,8 @@ Main.Main = class {
         Runtime.experiments.enableForTest('cssTrackerPanel');
       if (testPath.indexOf('audits2/') !== -1)
         Runtime.experiments.enableForTest('audits2');
+      if (testPath.indexOf('help/') !== -1)
+        Runtime.experiments.enableForTest('releaseNote');
     }
 
     Runtime.experiments.setDefaultExperiments(['persistenceValidation', 'timelineMultipleMainViews']);
@@ -186,6 +189,9 @@ Main.Main = class {
         new Bindings.BreakpointManager(null, Workspace.workspace, SDK.targetManager, Bindings.debuggerWorkspaceBinding);
     Extensions.extensionServer = new Extensions.ExtensionServer();
 
+    if (!Host.isUnderTest())
+      Help.ReleaseNoteManager.init();
+
     new Persistence.FileSystemWorkspaceBinding(Workspace.isolatedFileSystemManager, Workspace.workspace);
     Persistence.persistence =
         new Persistence.Persistence(Workspace.workspace, Bindings.breakpointManager, Workspace.fileSystemMapping);