[Tracing] Embed V8 runtime call stats into tracing.

src/api-arguments.cc

Index: src/api-arguments.cc
diff --git a/src/api-arguments.cc b/src/api-arguments.cc
index f8d6c8fcc3ddda3ee8d83e5419be4b7127ff8f8a..6e347c7b6217c2bb4cc2d830df9aa0d28cf8e8ad 100644
--- a/src/api-arguments.cc
+++ b/src/api-arguments.cc
@@ -13,6 +13,8 @@ namespace internal {
 Handle<Object> FunctionCallbackArguments::Call(FunctionCallback f) {
   Isolate* isolate = this->isolate();
   RuntimeCallTimerScope timer(isolate, &RuntimeCallStats::FunctionCallback);
+  TRACE_EVENT_RUNTIME_CALL_STATS_TRACING_SCOPED(
+      isolate, &internal::tracing::TraceEventStatsTable::FunctionCallback);
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, FUNCTION_ADDR(f));
   FunctionCallbackInfo<v8::Value> info(begin(), argv_, argc_);
@@ -24,6 +26,8 @@ Handle<JSObject> PropertyCallbackArguments::Call(
     IndexedPropertyEnumeratorCallback f) {
   Isolate* isolate = this->isolate();
   RuntimeCallTimerScope timer(isolate, &RuntimeCallStats::PropertyCallback);
+  TRACE_EVENT_RUNTIME_CALL_STATS_TRACING_SCOPED(
+      isolate, &internal::tracing::TraceEventStatsTable::PropertyCallback);
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, FUNCTION_ADDR(f));
   PropertyCallbackInfo<v8::Array> info(begin());