Correctly report callstack when current function is FunctionCall builtin

src/cpu-profiler.h

Index: src/cpu-profiler.h
diff --git a/src/cpu-profiler.h b/src/cpu-profiler.h
index 98096be090c7b6b0dfd5ebaa72791728aad17a12..61d40f02aa1a67cac39c1c8754564116f8020ddd 100644
--- a/src/cpu-profiler.h
+++ b/src/cpu-profiler.h
@@ -49,7 +49,8 @@ class TokenEnumerator;
 #define CODE_EVENTS_TYPE_LIST(V)                                   \
   V(CODE_CREATION,    CodeCreateEventRecord)                       \
   V(CODE_MOVE,        CodeMoveEventRecord)                         \
-  V(SHARED_FUNC_MOVE, SharedFunctionInfoMoveEventRecord)
+  V(SHARED_FUNC_MOVE, SharedFunctionInfoMoveEventRecord)           \
+  V(REPORT_BUILTIN,   ReportBuiltinEventRecord)
 
 
 class CodeEventRecord {
@@ -96,6 +97,15 @@ class SharedFunctionInfoMoveEventRecord : public CodeEventRecord {
 };
 
 
+class ReportBuiltinEventRecord : public CodeEventRecord {
+ public:
+  Address start;
+  Builtins::Name builtin_id;
+
+  INLINE(void UpdateCodeMap(CodeMap* code_map));
+};
+
+
 class TickSampleEventRecord {
  public:
   // The parameterless constructor is used when we dequeue data from
@@ -246,6 +256,7 @@ class CpuProfiler {
   void StopProcessorIfLastProfile(const char* title);
   void StopProcessor();
   void ResetProfiles();
+  void LogBuiltins();
 
   Isolate* isolate_;
   CpuProfilesCollection* profiles_;