[cc] Remove remaining_frames from BeginFrameAck.

cc/scheduler/scheduler.cc

Index: cc/scheduler/scheduler.cc
diff --git a/cc/scheduler/scheduler.cc b/cc/scheduler/scheduler.cc
index 4cffcd58a1674da8534ca93c61c720c7e526f47b..d532ce3b07d7478d7eea238f0df43884f7d299e5 100644
--- a/cc/scheduler/scheduler.cc
+++ b/cc/scheduler/scheduler.cc
@@ -455,7 +455,7 @@ void Scheduler::SendBeginFrameAck(const BeginFrameArgs& args,
   }
 
   BeginFrameAck ack(args.source_id, args.sequence_number,
-                    latest_confirmed_sequence_number, 0, did_submit);
+                    latest_confirmed_sequence_number, did_submit);
   begin_frame_source_->DidFinishFrame(this, ack);
 }
 
@@ -802,7 +802,7 @@ BeginFrameAck Scheduler::CurrentBeginFrameAckForActiveTree() const {
   return BeginFrameAck(
       begin_main_frame_args_.source_id, begin_main_frame_args_.sequence_number,
       state_machine_.last_begin_frame_sequence_number_active_tree_was_fresh(),
-      0, true);
+      true);
 }
 
 }  // namespace cc