[Interpreter] Add ignition compile trace events.

src/interpreter/interpreter.cc

Index: src/interpreter/interpreter.cc
diff --git a/src/interpreter/interpreter.cc b/src/interpreter/interpreter.cc
index 56bcc14332f83c2e6870fd824f21061ba01624d9..f8ec78b7b80d13ff5a40acf397be6b4937a86ac4 100644
--- a/src/interpreter/interpreter.cc
+++ b/src/interpreter/interpreter.cc
@@ -66,6 +66,9 @@ int Interpreter::InterruptBudget() {
 }
 
 bool Interpreter::MakeBytecode(CompilationInfo* info) {
+  TimerEventScope<TimerEventCompileIgnition> timer(info->isolate());

[jochen (gone - plz use gerrit), 2016/03/18 12:40:31]

why both a timer event scope and a trace event?

[rmcilroy, 2016/03/18 12:42:44]

I was making it the same as FCG - I thought we might want to scope timer events
during ignition compile in the same way as FCG does. Happy to remove this if you
don't think it's useful though.

+  TRACE_EVENT0("v8", "V8.CompileIgnition");
+
   if (FLAG_print_bytecode || FLAG_print_source || FLAG_print_ast) {
     OFStream os(stdout);
     base::SmartArrayPointer<char> name = info->GetDebugName();