Support piping log data 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 5b10ab0f6803fca90299bd0a3f50e88e30a88404..9a3054b3d83034286ddc7c3e8019d568132fd31b 100644
--- a/runtime/vm/json_stream.cc
+++ b/runtime/vm/json_stream.cc
@@ -270,6 +270,11 @@ void JSONStream::PrintValue64(int64_t i) {
 }
 
 
+void JSONStream::PrintValueTimeMillis(int64_t millis) {
+  PrintValue(static_cast<double>(millis));
+}
+
+
 void JSONStream::PrintValue(double d) {
   PrintCommaIfNeeded();
   buffer_.Printf("%f", d);
@@ -422,6 +427,11 @@ void JSONStream::PrintProperty64(const char* name, int64_t i) {
 }
 
 
+void JSONStream::PrintPropertyTimeMillis(const char* name, int64_t millis) {
+  PrintProperty(name, static_cast<double>(millis));
+}
+
+
 void JSONStream::PrintProperty(const char* name, double d) {
   PrintPropertyName(name);
   PrintValue(d);