Add pause/resume for isolates in vmservice/observatory.

runtime/vm/debugger_test.cc

Index: runtime/vm/debugger_test.cc
diff --git a/runtime/vm/debugger_test.cc b/runtime/vm/debugger_test.cc
index 820c5db1400237c14eb1d3e33b84e5a2e83d5954..d9c508b23bf3dcb8dae7be5a2db9530fc10bb300 100644
--- a/runtime/vm/debugger_test.cc
+++ b/runtime/vm/debugger_test.cc
@@ -65,9 +65,9 @@ static void InspectPausedEvent(Dart_IsolateId isolate_id,
 
   // The debugger knows that it is paused, and why.
   EXPECT(debugger->IsPaused());
-  const Debugger::DebuggerEvent* event = debugger->PauseEvent();
+  const DebuggerEvent* event = debugger->PauseEvent();
   EXPECT(event != NULL);
-  EXPECT(event->type == Debugger::kBreakpointReached);
+  EXPECT(event->type() == DebuggerEvent::kBreakpointReached);
   saw_paused_event = true;
 }