Centralized event streams

runtime/observatory/tests/observatory_ui/mocks/objects/event.dart

Index: runtime/observatory/tests/observatory_ui/mocks/objects/event.dart
diff --git a/runtime/observatory/lib/src/mocks/objects/event.dart b/runtime/observatory/tests/observatory_ui/mocks/objects/event.dart
similarity index 96%
rename from runtime/observatory/lib/src/mocks/objects/event.dart
rename to runtime/observatory/tests/observatory_ui/mocks/objects/event.dart
index 6a646f3cdb567ea5a105f2ccbba8a565e1a11ec5..24acb8bfc4d99b2278bce6eb6a404ff8556875b2 100644
--- a/runtime/observatory/lib/src/mocks/objects/event.dart
+++ b/runtime/observatory/tests/observatory_ui/mocks/objects/event.dart
@@ -42,6 +42,11 @@ class ServiceExtensionAddedEventMock implements M.ServiceExtensionAddedEvent {
   const ServiceExtensionAddedEventMock({this.extensionRPC, this.isolate,
       this.timestamp});
 }
+class DebuggerSettingsUpdateEventMock implements M.PauseStartEvent {
+  final DateTime timestamp;
+  final M.IsolateRef isolate;
+  const DebuggerSettingsUpdateEventMock({this.isolate, this.timestamp});
+}
 class PauseStartEventMock implements M.PauseStartEvent {
   final DateTime timestamp;
   final M.IsolateRef isolate;