[cc] Remove remaining_frames from BeginFrameAck.

cc/output/begin_frame_args.cc

 // Copyright 2013 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/output/begin_frame_args.h"
 
 #include "base/trace_event/trace_event_argument.h"
 
 namespace cc {
 
@@ skipping 93 matching lines @@
 }
 
 base::TimeDelta BeginFrameArgs::DefaultInterval() {
   return base::TimeDelta::FromMicroseconds(16666);
 }
 
 BeginFrameAck::BeginFrameAck()
     : sequence_number(BeginFrameArgs::kInvalidFrameNumber),
       latest_confirmed_sequence_number(BeginFrameArgs::kInvalidFrameNumber),
       source_id(0),
-      remaining_frames(0),
       has_damage(false) {}
 
 BeginFrameAck::BeginFrameAck(uint32_t source_id,
                              uint64_t sequence_number,
                              uint64_t latest_confirmed_sequence_number,
-                             uint32_t remaining_frames,
                              bool has_damage)
     : sequence_number(sequence_number),
       latest_confirmed_sequence_number(latest_confirmed_sequence_number),
       source_id(source_id),
-      remaining_frames(remaining_frames),
       has_damage(has_damage) {
   DCHECK_LT(BeginFrameArgs::kInvalidFrameNumber, sequence_number);
 }
 
 // static
 BeginFrameAck BeginFrameAck::CreateManualAckWithDamage() {
   return BeginFrameAck(BeginFrameArgs::kManualSourceId,
                        BeginFrameArgs::kStartingFrameNumber,
-                       BeginFrameArgs::kInvalidFrameNumber, 0, true);
+                       BeginFrameArgs::kInvalidFrameNumber, true);
 }
 
 }  // namespace cc