Timeline service protocol support with Observatory UI

runtime/observatory/lib/src/app/application.dart

Index: runtime/observatory/lib/src/app/application.dart
diff --git a/runtime/observatory/lib/src/app/application.dart b/runtime/observatory/lib/src/app/application.dart
index c4050e537497de2940241cd3176e14aa399414b5..bda98c0df942e090aaa97622c096b57f2ab335d8 100644
--- a/runtime/observatory/lib/src/app/application.dart
+++ b/runtime/observatory/lib/src/app/application.dart
@@ -141,6 +141,7 @@ class ObservatoryApplication extends Observable {
     _pageRegistry.add(new MetricsPage(this));
     _pageRegistry.add(new PortsPage(this));
     _pageRegistry.add(new LoggingPage(this));
+    _pageRegistry.add(new TimelinePage(this));
     // Note that ErrorPage must be the last entry in the list as it is
     // the catch all.
     _pageRegistry.add(new ErrorPage(this));