Support piping log data over the service protocol

runtime/vm/service.h

Index: runtime/vm/service.h
diff --git a/runtime/vm/service.h b/runtime/vm/service.h
index 9e25340389b6941a1fc7fe9787163c4024211274..3b23f6d553bd7c0902311de5a7f3bc4d0733ec1e 100644
--- a/runtime/vm/service.h
+++ b/runtime/vm/service.h
@@ -108,12 +108,23 @@ class Service : public AllStatic {
                                 const uint8_t* bytes,
                                 intptr_t bytes_len);
 
+  static void SendLogEvent(Isolate* isolate,
+                           int64_t sequence_number,
+                           int64_t timestamp,
+                           intptr_t level,
+                           const String& name,
+                           const String& message,
+                           const Instance& zone,
+                           const Object& error,
+                           const Instance& stack_trace);
+
   // Well-known streams.
   static StreamInfo isolate_stream;
   static StreamInfo debug_stream;
   static StreamInfo gc_stream;
   static StreamInfo echo_stream;
   static StreamInfo graph_stream;
+  static StreamInfo logging_stream;
 
   static bool ListenStream(const char* stream_id);
   static void CancelStream(const char* stream_id);
@@ -137,6 +148,7 @@ class Service : public AllStatic {
   static void SendEvent(const char* stream_id,
                         const char* event_type,
                         const Object& eventMessage);
+
   // Does not take ownership of 'data'.
   static void SendEventWithData(const char* stream_id,
                                 const char* event_type,
@@ -144,6 +156,10 @@ class Service : public AllStatic {
                                 const uint8_t* data,
                                 intptr_t size);
 
+  static void PostEvent(const char* stream_id,
+                        const char* kind,
+                        JSONStream* event);
+
   static EmbedderServiceHandler* isolate_service_handler_head_;
   static EmbedderServiceHandler* root_service_handler_head_;
   static Dart_ServiceStreamListenCallback stream_listen_callback_;