Use base::Optional<int32_t> in H264POC::ComputePicOrderCnt(...)

media/gpu/vt_video_decode_accelerator_mac.h

 // Copyright 2014 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.
 
 #ifndef MEDIA_GPU_VT_VIDEO_DECODE_ACCELERATOR_MAC_H_
 #define MEDIA_GPU_VT_VIDEO_DECODE_ACCELERATOR_MAC_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 139 matching lines @@
 
   struct FrameOrder {
     bool operator()(const linked_ptr<Frame>& lhs,
                     const linked_ptr<Frame>& rhs) const;
   };
 
   //
   // Methods for interacting with VideoToolbox. Run on |decoder_thread_|.
   //
 
-  // Compute the |pic_order_cnt| for a frame. Returns true or calls
-  // NotifyError() before returning false.
-  bool ComputePicOrderCnt(const H264SPS* sps,
-                          const H264SliceHeader& slice_hdr,
-                          Frame* frame);
-
   // Set up VideoToolbox using the current SPS and PPS. Returns true or calls
   // NotifyError() before returning false.
   bool ConfigureDecoder();
 
   // Wait for VideoToolbox to output all pending frames. Returns true or calls
   // NotifyError() before returning false.
   bool FinishDelayedFrames();
 
   // |frame| is owned by |pending_frames_|.
   void DecodeTask(const BitstreamBuffer&, Frame* frame);
@@ skipping 111 matching lines @@
   // Declared last to ensure that all weak pointers are invalidated before
   // other destructors run.
   base::WeakPtrFactory<VTVideoDecodeAccelerator> weak_this_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VTVideoDecodeAccelerator);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_GPU_VT_VIDEO_DECODE_ACCELERATOR_MAC_H_