Allow Observatory debugger to switch isolates.

runtime/vm/service_event.cc

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/service_event.h"
 
 namespace dart {
 
 // Translate from the legacy DebugEvent to a ServiceEvent.
 static ServiceEvent::EventType TranslateEventType(
@@ skipping 40 matching lines @@
   }
 }
 
 
 const char* ServiceEvent::EventTypeToCString(EventType type) {
   switch (type) {
     case kIsolateStart:
       return "IsolateStart";
     case kIsolateExit:
       return "IsolateExit";
+    case kIsolateUpdate:
+      return "IsolateUpdate";
     case kPauseStart:
       return "PauseStart";
     case kPauseExit:
       return "PauseExit";
     case kPauseBreakpoint:
       return "PauseBreakpoint";
     case kPauseInterrupted:
       return "PauseInterrupted";
     case kPauseException:
       return "PauseException";
@@ skipping 23 matching lines @@
   if (top_frame() != NULL) {
     JSONObject jsFrame(&jsobj, "topFrame");
     top_frame()->PrintToJSONObject(&jsFrame);
   }
   if (exception() != NULL) {
     jsobj.AddProperty("exception", *(exception()));
   }
 }
 
 }  // namespace dart