[cc] Fix CompositorFrameSinkSupport BeginFrameAck interface.

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 109 matching lines @@
                              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);
+}
+
 }  // namespace cc