Convert media constants to constexpr.

media/filters/decoder_stream.cc

 // 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.
 
 #include "media/filters/decoder_stream.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 357 matching lines @@
 
   int buffer_size = buffer->end_of_stream() ? 0 : buffer->data_size();
 
   TRACE_EVENT_ASYNC_BEGIN2(
       "media", GetTraceString<StreamType>(), this, "key frame",
       !buffer->end_of_stream() && buffer->is_key_frame(), "timestamp (ms)",
       !buffer->end_of_stream() ? buffer->timestamp().InMilliseconds() : 0);
 
   if (buffer->end_of_stream())
     decoding_eos_ = true;
-  else if (buffer->duration() != kNoTimestamp())
+  else if (buffer->duration() != kNoTimestamp)
     duration_tracker_.AddSample(buffer->duration());
 
   ++pending_decode_requests_;
   decoder_->Decode(buffer, base::Bind(&DecoderStream<StreamType>::OnDecodeDone,
                                       fallback_weak_factory_.GetWeakPtr(),
                                       buffer_size, buffer->end_of_stream()));
 }
 
 template <DemuxerStream::Type StreamType>
 void DecoderStream<StreamType>::FlushDecoder() {
@@ skipping 271 matching lines @@
     return;
   }
 
   if (status == DemuxerStream::kAborted) {
     if (!read_cb_.is_null())
       SatisfyRead(DEMUXER_READ_ABORTED, NULL);
     return;
   }
 
   if (!splice_observer_cb_.is_null() && !buffer->end_of_stream()) {
-    const bool has_splice_ts = buffer->splice_timestamp() != kNoTimestamp();
+    const bool has_splice_ts = buffer->splice_timestamp() != kNoTimestamp;
     if (active_splice_ || has_splice_ts) {
       splice_observer_cb_.Run(buffer->splice_timestamp());
       active_splice_ = has_splice_ts;
     }
   }
 
   DCHECK(status == DemuxerStream::kOk) << status;
   Decode(buffer);
 
   // Read more data if the decoder supports multiple parallel decoding requests.
@@ skipping 103 matching lines @@
   }
 
   // The resetting process will be continued in OnDecoderReinitialized().
   ReinitializeDecoder();
 }
 
 template class DecoderStream<DemuxerStream::VIDEO>;
 template class DecoderStream<DemuxerStream::AUDIO>;
 
 }  // namespace media