Allow setting break-on-exceptions option over the service protocol.

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

 // Copyright (c) 2013, 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.
 
 part of app;
 
 class Notification {
   Notification.fromEvent(this.event);
   Notification.fromException(this.exception, this.stacktrace);
 
@@ skipping 75 matching lines @@
 
   void _onEvent(ServiceEvent event) {
     switch(event.kind) {
       case ServiceEvent.kIsolateStart:
       case ServiceEvent.kIsolateUpdate:
       case ServiceEvent.kGraph:
       case ServiceEvent.kBreakpointAdded:
       case ServiceEvent.kBreakpointResolved:
       case ServiceEvent.kBreakpointRemoved:
       case ServiceEvent.kGC:
+      case ServiceEvent.kDebuggerSettingsUpdate:
         // Ignore for now.
         break;
 
       case ServiceEvent.kIsolateExit:
       case ServiceEvent.kResume:
         removePauseEvents(event.isolate);
         break;
 
       case ServiceEvent.kPauseStart:
       case ServiceEvent.kPauseExit:
@@ skipping 111 matching lines @@
     this.vm = new FakeVM(crashDump['result']);
     app.locationManager.go('#/vm');
   }
 
   void handleException(e, st) {
     // TODO(turnidge): Report this failure via analytics.
     Logger.root.warning('Caught exception: ${e}\n${st}');
     notifications.add(new Notification.fromException(e, st));
   }
 }