Convert media constants to constexpr.

media/base/android/media_decoder_job.h

 // 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.
 
 #ifndef MEDIA_BASE_ANDROID_MEDIA_DECODER_JOB_H_
 #define MEDIA_BASE_ANDROID_MEDIA_DECODER_JOB_H_
 
 #include <stddef.h>
 #include <memory>
 
@@ skipping 27 matching lines @@
     STATUS_FAILURE,
   };
 
   struct Deleter {
     inline void operator()(MediaDecoderJob* ptr) const { ptr->Release(); }
   };
 
   // Callback when a decoder job finishes its work. Args: whether decode
   // finished successfully, a flag whether the frame is late for statistics,
   // cacurrent presentation time, max presentation time.
-  // If the current presentation time is equal to kNoTimestamp(), the decoder
+  // If the current presentation time is equal to kNoTimestamp, the decoder
   // job skipped rendering of the decoded output and the callback target should
   // ignore the timestamps provided. The late frame flag has no meaning in this
   // case.
   typedef base::Callback<void(MediaCodecStatus, bool, base::TimeDelta,
                               base::TimeDelta)> DecoderCallback;
 
   virtual ~MediaDecoderJob();
 
   // Called by MediaSourcePlayer when more data for this object has arrived.
   void OnDataReceived(const DemuxerData& data);
@@ skipping 299 matching lines @@
   // This access unit is passed to the decoder during config changes to drain
   // the decoder.
   AccessUnit eos_unit_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(MediaDecoderJob);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_MEDIA_DECODER_JOB_H_