Use TracedValue in runtime statistics.

src/tracing/traced-value.cc

Index: src/tracing/traced-value.cc
diff --git a/src/tracing/traced-value.cc b/src/tracing/traced-value.cc
index 3406bbf6fe71bfbbb16e53471abda711eeeb99ec..0c73b042956422876c461efdd3d7e7a9f1604e3c 100644
--- a/src/tracing/traced-value.cc
+++ b/src/tracing/traced-value.cc
@@ -121,6 +121,12 @@ void TracedValue::AppendInteger(int value) {
   data_ += std::to_string(value);
 }
 
+void TracedValue::AppendLongInteger(int64_t value) {
+  DCHECK_CURRENT_CONTAINER_IS(kStackTypeArray);
+  WriteComma();
+  data_ += std::to_string(value);
+}
+
 void TracedValue::AppendDouble(double value) {
   DCHECK_CURRENT_CONTAINER_IS(kStackTypeArray);
   WriteComma();