[cc] Remove remaining_frames from BeginFrameAck.

cc/scheduler/scheduler.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/scheduler/scheduler.h"
 
 #include <algorithm>
 
 #include "base/auto_reset.h"
 #include "base/logging.h"
@@ skipping 437 matching lines @@
         state_machine_
             .last_begin_frame_sequence_number_compositor_frame_was_fresh();
   }
 
   bool did_submit = false;
   if (result == kBeginFrameFinished) {
     did_submit = state_machine_.did_submit_in_last_frame();
   }
 
   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);
 }
 
 // BeginImplFrame starts a compositor frame that will wait up until a deadline
 // for a BeginMainFrame+activation to complete before it times out and draws
 // any asynchronous animation and scroll/pinch updates.
 void Scheduler::BeginImplFrame(const BeginFrameArgs& args,
                                base::TimeTicks now) {
   DCHECK_EQ(state_machine_.begin_impl_frame_state(),
             SchedulerStateMachine::BEGIN_IMPL_FRAME_STATE_IDLE);
@@ skipping 326 matching lines @@
   return (state_machine_.begin_main_frame_state() ==
               SchedulerStateMachine::BEGIN_MAIN_FRAME_STATE_SENT ||
           state_machine_.begin_main_frame_state() ==
               SchedulerStateMachine::BEGIN_MAIN_FRAME_STATE_STARTED);
 }
 
 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