[counters] Making counter properly reentrant.

src/arguments.h

Index: src/arguments.h
diff --git a/src/arguments.h b/src/arguments.h
index cba1b439958c993ea50732e76946a8fbf04057f6..25075f7f0d65e79c29aae4b7eee0296a61bd279b 100644
--- a/src/arguments.h
+++ b/src/arguments.h
@@ -275,16 +275,14 @@ double ClobberDoubleRegisters(double x1, double x2, double x3, double x4);
   static INLINE(Type __RT_impl_##Name(Arguments args, Isolate* isolate));  \
   Type Name(int args_length, Object** args_object, Isolate* isolate) {     \
     CLOBBER_DOUBLE_REGISTERS();                                            \
-    base::ElapsedTimer timer;                                              \
     if (FLAG_runtime_call_stats) {                                         \
       RuntimeCallStats* stats = isolate->counters()->runtime_call_stats(); \
       stats->Enter(&stats->Name);                                          \
-      timer.Start();                                                       \
     }                                                                      \
     Arguments args(args_length, args_object);                              \
     Type value = __RT_impl_##Name(args, isolate);                          \
     if (FLAG_runtime_call_stats) {                                         \
-      isolate->counters()->runtime_call_stats()->Leave(timer.Elapsed());   \
+      isolate->counters()->runtime_call_stats()->Leave();                  \
     }                                                                      \
     return value;                                                          \
   }                                                                        \