Stream blocks of timeline events over the service protocol

runtime/vm/json_stream.cc

Index: runtime/vm/json_stream.cc
diff --git a/runtime/vm/json_stream.cc b/runtime/vm/json_stream.cc
index 94928ab5473c68bc54294f32f63391293246042f..a68d87d8553b56dfa0cd69cb70c75713ab62bbd0 100644
--- a/runtime/vm/json_stream.cc
+++ b/runtime/vm/json_stream.cc
@@ -475,12 +475,18 @@ void JSONStream::PrintValue(Isolate* isolate, bool ref) {
 }
 
 
-void JSONStream::PrintValue(TimelineEvent* timeline_event) {
+void JSONStream::PrintValue(const TimelineEvent* timeline_event) {
   PrintCommaIfNeeded();
   timeline_event->PrintJSON(this);
 }
 
 
+void JSONStream::PrintValue(const TimelineEventBlock* timeline_event_block) {
+  PrintCommaIfNeeded();
+  timeline_event_block->PrintJSON(this);
+}
+
+
 void JSONStream::PrintValueVM(bool ref) {
   PrintCommaIfNeeded();
   Service::PrintJSONForVM(this, ref);
@@ -593,12 +599,19 @@ void JSONStream::PrintProperty(const char* name, Isolate* isolate) {
 
 
 void JSONStream::PrintProperty(const char* name,
-                               TimelineEvent* timeline_event) {
+                               const TimelineEvent* timeline_event) {
   PrintPropertyName(name);
   PrintValue(timeline_event);
 }
 
 
+void JSONStream::PrintProperty(const char* name,
+                               const TimelineEventBlock* timeline_event_block) {
+  PrintPropertyName(name);
+  PrintValue(timeline_event_block);
+}
+
+
 void JSONStream::PrintfProperty(const char* name, const char* format, ...) {
   PrintPropertyName(name);
   va_list args;