DevTools: implement release note behind an experiment

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

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2007 Matt Lilek (pewtermoose@gmail.com).
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 89 matching lines @@
     Runtime.experiments.register('colorContrastRatio', 'Contrast ratio line in color picker', true);
     Runtime.experiments.register('continueToFirstInvocation', 'Continue to first invocation', true);
     Runtime.experiments.register('cssTrackerPanel', 'Panel that tracks the usage of CSS rules.');
     Runtime.experiments.register('emptySourceMapAutoStepping', 'Empty sourcemap auto-stepping');
     Runtime.experiments.register('inputEventsOnTimelineOverview', 'Input events on Timeline overview', true);
     Runtime.experiments.register('liveSASS', 'Live SASS');
     Runtime.experiments.register('networkGroupingRequests', 'Network request groups support', true);
     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);
     Runtime.experiments.register('timelinePaintTimingMarkers', 'Show paint timing markers on Timeline', true);
     Runtime.experiments.register('sourceDiff', 'Source diff');
     Runtime.experiments.register('terminalInDrawer', 'Terminal in drawer', true);
     Runtime.experiments.register('timelineInvalidationTracking', 'Timeline invalidation tracking', true);
     Runtime.experiments.register('timelineMultipleMainViews', 'Timeline with multiple main views');
     Runtime.experiments.register('timelineTracingJSProfile', 'Timeline tracing based JS profiler', true);
     Runtime.experiments.register('timelineV8RuntimeCallStats', 'V8 Runtime Call Stats on Timeline', true);
     Runtime.experiments.register('timelinePerFrameTrack', 'Show track per frame on Timeline', true);
 
     Runtime.experiments.cleanUpStaleExperiments();
 
     if (Host.isUnderTest(prefs)) {
       var testPath = JSON.parse(prefs['testPath'] || '""');
       // Enable experiments for testing.
       if (testPath.indexOf('accessibility/') !== -1)
         Runtime.experiments.enableForTest('accessibilityInspection');
       if (testPath.indexOf('coverage') !== -1)
         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']);
   }
 
   /**
    * @suppressGlobalPropertiesCheck
    */
   _createAppUI() {
     console.time('Main._createAppUI');
@@ skipping 128 matching lines @@
     function webSocketConnectionLost() {
       if (!Main._disconnectedScreenWithReasonWasShown)
         Main.RemoteDebuggingTerminatedScreen.show('WebSocket disconnected');
     }
   }
 
   _lateInitialization() {
     console.timeStamp('Main._lateInitialization');
     this._registerShortcuts();
     Extensions.extensionServer.initializeExtensions();
+    if (!Host.isUnderTest())
+      Help.showReleaseNoteIfNeeded();
   }
 
   _registerForwardedShortcuts() {
     /** @const */ var forwardedActions =
         ['main.toggle-dock', 'debugger.toggle-breakpoints-active', 'debugger.toggle-pause', 'commandMenu.show'];
     var actionKeys =
         UI.shortcutRegistry.keysForActions(forwardedActions).map(UI.KeyboardShortcut.keyCodeAndModifiersFromKey);
     InspectorFrontendHost.setWhitelistedShortcuts(JSON.stringify(actionKeys));
   }
 
@@ skipping 685 matching lines @@
    * @override
    * @return {?Element}
    */
   settingElement() {
     return UI.SettingsUI.createSettingCheckbox(
         Common.UIString('Show rulers'), Common.moduleSetting('showMetricsRulers'));
   }
 };
 
 new Main.Main();