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 5ba641dd25c941a8cb67763e814a84351bb65c33..88be57a56242e2cb1855525705a6603e31bbc986 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', 'Show release notes', 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);