Correctly report callstack when current function is FunctionCall builtin

src/cpu-profiler-inl.h

Index: src/cpu-profiler-inl.h
diff --git a/src/cpu-profiler-inl.h b/src/cpu-profiler-inl.h
index 408d46bfb7d1e40e95d7e42b97f3790a263c914b..c3cc27c770eafc812c94f8a42ad9416f0132a9eb 100644
--- a/src/cpu-profiler-inl.h
+++ b/src/cpu-profiler-inl.h
@@ -56,6 +56,17 @@ void SharedFunctionInfoMoveEventRecord::UpdateCodeMap(CodeMap* code_map) {
 }
 
 
+void ReportBuiltinEventRecord::UpdateCodeMap(CodeMap* code_map) {
+  CodeEntry* entry = code_map->FindEntry(start);
+  if (!entry) {
+    // Code objects for builtins should already have been added to the map but
+    // some of them have been filtered out by CpuProfiler.
+    return;
+  }
+  entry->SetBuiltinId(builtin_id);
+}
+
+
 TickSample* ProfilerEventsProcessor::TickSampleEvent() {
   generator_->Tick();
   TickSampleEventRecord* evt =