Revert of Make SingleThreadProxy a SchedulerClient

cc/scheduler/scheduler_state_machine.cc

Index: cc/scheduler/scheduler_state_machine.cc
diff --git a/cc/scheduler/scheduler_state_machine.cc b/cc/scheduler/scheduler_state_machine.cc
index e2e8168f660b37c737f2a9d02e2b7a8fb00ec2df..dea25b40871b440405ed48ea51300224770c26cb 100644
--- a/cc/scheduler/scheduler_state_machine.cc
+++ b/cc/scheduler/scheduler_state_machine.cc
@@ -1006,9 +1006,7 @@
   }
 }
 
-void SchedulerStateMachine::SetNeedsCommit() {
-  needs_commit_ = true;
-}
+void SchedulerStateMachine::SetNeedsCommit() { needs_commit_ = true; }
 
 void SchedulerStateMachine::NotifyReadyToCommit() {
   DCHECK(commit_state_ == COMMIT_STATE_BEGIN_MAIN_FRAME_STARTED) << *AsValue();