Add a trace to output the scheduler settings.

cc/scheduler/scheduler.cc

Index: cc/scheduler/scheduler.cc
diff --git a/cc/scheduler/scheduler.cc b/cc/scheduler/scheduler.cc
index bf38cb3761c6ccc68a7f4baec178a7d88d7887ef..9345561f7dd379c69bba874bfa41667d7bf30c83 100644
--- a/cc/scheduler/scheduler.cc
+++ b/cc/scheduler/scheduler.cc
@@ -86,6 +86,10 @@ Scheduler::Scheduler(
       inside_process_scheduled_actions_(false),
       inside_action_(SchedulerStateMachine::ACTION_NONE),
       weak_factory_(this) {
+  TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("cc.debug.scheduler"),
+               "Scheduler::Scheduler",
+               "settings",
+               ToTrace(settings_));
   DCHECK(client_);
   DCHECK(!state_machine_.BeginFrameNeeded());
   if (settings_.main_frame_before_activation_enabled) {