Implement 'print', 'up', 'down', and 'frame' commands in the Observatory debugger.

runtime/vm/service.h

 // 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.
 
 #ifndef VM_SERVICE_H_
 #define VM_SERVICE_H_
 
 #include "include/dart_api.h"
 
 #include "vm/allocation.h"
@@ skipping 50 matching lines @@
   static const int kEventFamilyGC = 1;
   static const uint32_t kEventFamilyDebugMask = (1 << kEventFamilyDebug);
   static const uint32_t kEventFamilyGCMask = (1 << kEventFamilyGC);
 
   static void EmbedderHandleMessage(EmbedderServiceHandler* handler,
                                     JSONStream* js);
 
   static EmbedderServiceHandler* FindIsolateEmbedderHandler(const char* name);
   static EmbedderServiceHandler* FindRootEmbedderHandler(const char* name);
 
-  static void SendEvent(intptr_t eventId, const Object& eventMessage);
+  static void SendEvent(intptr_t eventFamilyId,
+                        intptr_t eventType,
+                        const Object& eventMessage);
   // Does not take ownership of 'data'.
   static void SendEvent(intptr_t eventId,
                         const String& meta,
                         const uint8_t* data,
                         intptr_t size);
 
   static EmbedderServiceHandler* isolate_service_handler_head_;
   static EmbedderServiceHandler* root_service_handler_head_;
 
   static uint32_t event_mask_;
 };
 
 }  // namespace dart
 
 #endif  // VM_SERVICE_H_