Annotate runtime call stats with trace events

I used a new category "v8.runtime" and all events are disabled by
default, so there shouldn't be any perf impact.

BUG=none
R=fmeawad@chromium.org,cbruni@chromium.org

Review URL: https://codereview.chromium.org/1770353002

Cr-Commit-Position: refs/heads/master@{#34620}

src/arguments.h

@@ -7,6 +7,7 @@
 
 #include "src/allocation.h"
 #include "src/isolate.h"
+#include "src/tracing/trace-event.h"
 
 namespace v8 {
 namespace internal {
@@ -277,6 +278,7 @@ double ClobberDoubleRegisters(double x1, double x2, double x3, double x4);
     CLOBBER_DOUBLE_REGISTERS();                                            \
     Arguments args(args_length, args_object);                              \
     Type value;                                                            \
+    TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.runtime"), "V8." #Name);    \
     if (FLAG_runtime_call_stats) {                                         \
       RuntimeCallStats* stats = isolate->counters()->runtime_call_stats(); \
       RuntimeCallTimerScope timer(isolate, &stats->Name);                  \

src/builtins.cc

@@ -145,6 +145,8 @@ BUILTIN_LIST_C(DEF_ARG_TYPE)
     isolate->counters()->runtime_calls()->Increment();                         \
     RuntimeCallStats* stats = isolate->counters()->runtime_call_stats();       \
     RuntimeCallTimerScope timer(isolate, &stats->Builtin_##name);              \
+    TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.runtime"),                      \
+                 "V8.Builtin_" #name);                                         \
     name##ArgumentsType args(args_length, args_object);                        \
     Object* value = Builtin_Impl_##name(args, isolate);                        \
     return value;                                                              \

src/vm-state-inl.h

@@ -68,6 +68,8 @@ ExternalCallbackScope::ExternalCallbackScope(Isolate* isolate, Address callback)
     timer_.Initialize(&stats->ExternalCallback, stats->current_timer());
     stats->Enter(&timer_);
   }
+  TRACE_EVENT_BEGIN0(TRACE_DISABLED_BY_DEFAULT("v8.runtime"),
+                     "V8.ExternalCallback");
 }
 
 ExternalCallbackScope::~ExternalCallbackScope() {
@@ -75,6 +77,8 @@ ExternalCallbackScope::~ExternalCallbackScope() {
     isolate_->counters()->runtime_call_stats()->Leave(&timer_);
   }
   isolate_->set_external_callback_scope(previous_scope_);
+  TRACE_EVENT_END0(TRACE_DISABLED_BY_DEFAULT("v8.runtime"),
+                   "V8.ExternalCallback");
 }
 
 Address ExternalCallbackScope::scope_address() {