Implement AggregatableHistogramTimer and use it to measure how much time

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index ffc956080bc6382541149a286d0e96bb3dbd94db..601faf9b47bf9c12b8a840a5d7e8c857839a5ef4 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -1480,6 +1480,7 @@ Local<Value> Script::Run() {
   ON_BAILOUT(isolate, "v8::Script::Run()", return Local<Value>());
   LOG_API(isolate, "Script::Run");
   ENTER_V8(isolate);
+  i::AggregatingHistogramTimerScope timer(isolate->counters()->compile_lazy());
   i::TimerEventScope<i::TimerEventExecute> timer_scope(isolate);
   i::HandleScope scope(isolate);
   i::Handle<i::JSFunction> fun = i::Handle<i::JSFunction>::cast(obj);