[tracing] Correct "V8.OptimizeCode" scope.

The "V8.OptimizeCode" trace event (in "disabled-by-default-v8.compile"
category) didn't include the setup of the OptimizedCompilationJob, which
is quite expensive already and should be accounted for properly.

Bug: v8:8598
Change-Id: Ieec139c8d555d02edfbc52e904ee214d1007afbd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1533871Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60413}

src/compiler.cc

@@ -781,6 +781,11 @@ MaybeHandle<Code> GetOptimizedCode(Handle<JSFunction> function,
   function->feedback_vector()->set_profiler_ticks(0);
 
   VMState<COMPILER> state(isolate);
+  TimerEventScope<TimerEventOptimizeCode> optimize_code_timer(isolate);
+  RuntimeCallTimerScope runtimeTimer(isolate,
+                                     RuntimeCallCounterId::kOptimizeCode);
+  TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), "V8.OptimizeCode");
+
   DCHECK(!isolate->has_pending_exception());
   PostponeInterruptsScope postpone(isolate);
   bool has_script = shared->script()->IsScript();
@@ -806,11 +811,6 @@ MaybeHandle<Code> GetOptimizedCode(Handle<JSFunction> function,
     return MaybeHandle<Code>();
   }
 
-  TimerEventScope<TimerEventOptimizeCode> optimize_code_timer(isolate);
-  RuntimeCallTimerScope runtimeTimer(isolate,
-                                     RuntimeCallCounterId::kOptimizeCode);
-  TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), "V8.OptimizeCode");
-
   // In case of concurrent recompilation, all handles below this point will be
   // allocated in a deferred handle scope that is detached and handed off to
   // the background thread when we return.