Convert media constants to constexpr.

media/formats/mpeg/mpeg_audio_stream_parser_base.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/formats/mpeg/mpeg_audio_stream_parser_base.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 210 matching lines @@
     timestamp_helper_->SetBaseTimestamp(base_timestamp);
 
     std::unique_ptr<MediaTracks> media_tracks(new MediaTracks());
     if (config_.IsValidConfig()) {
       media_tracks->AddAudioTrack(config_, 1, "main", "", "");
     }
     if (!config_cb_.Run(std::move(media_tracks), TextTrackConfigMap()))
       return -1;
 
     if (!init_cb_.is_null()) {
-      InitParameters params(kInfiniteDuration());
+      InitParameters params(kInfiniteDuration);
       params.detected_audio_track_count = 1;
       params.auto_update_timestamp_offset = true;
       base::ResetAndReturn(&init_cb_).Run(params);
     }
   }
 
   if (metadata_frame)
     return frame_size;
 
   // TODO(wolenetz/acolwell): Validate and use a common cross-parser TrackId
@@ skipping 174 matching lines @@
   if (end_of_segment) {
     in_media_segment_ = false;
     end_of_segment_cb_.Run();
   }
 
   timestamp_helper_->SetBaseTimestamp(base::TimeDelta());
   return true;
 }
 
 }  // namespace media