Remove all uses of LOG_DISABLED in blink

third_party/WebKit/Source/modules/mediasource/SourceBuffer.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 787 matching lines @@
                   << " failed: unsupported track type "
                   << track_info.track_type;
       // TODO(servolk): Add handling of text tracks.
       NOTREACHED();
     }
     if (first_initialization_segment_received_ && !track) {
       BLINK_SBLOG << __func__ << " this=" << this
                   << " failed: tracks mismatch the first init segment.";
       return false;
     }
-#if !LOG_DISABLED
+#if DCHECK_IS_ON()
     const char* log_track_type_str =
         (track_info.track_type == WebMediaPlayer::kAudioTrack) ? "audio"
                                                                : "video";
     BLINK_SBLOG << __func__ << " this=" << this << " : " << log_track_type_str
                 << " track "
                 << " id=" << String(track_info.id) << " byteStreamTrackID="
                 << String(track_info.byte_stream_track_id)
                 << " kind=" << String(track_info.kind)
                 << " label=" << String(track_info.label)
                 << " language=" << String(track_info.language);
@@ skipping 500 matching lines @@
   visitor->Trace(async_event_queue_);
   visitor->Trace(append_buffer_async_part_runner_);
   visitor->Trace(remove_async_part_runner_);
   visitor->Trace(audio_tracks_);
   visitor->Trace(video_tracks_);
   EventTargetWithInlineData::Trace(visitor);
   SuspendableObject::Trace(visitor);
 }
 
 }  // namespace blink