Remove GetCurrentVideoTrackFormat dead code.

content/public/renderer/media_stream_utils.h

 // Copyright 2015 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 CONTENT_PUBLIC_RENDERER_MEDIA_STREAM_UTILS_H_
 #define CONTENT_PUBLIC_RENDERER_MEDIA_STREAM_UTILS_H_
 
 #include <memory>
 
 #include "base/memory/ref_counted.h"
@@ skipping 31 matching lines @@
 // channel mixing.
 CONTENT_EXPORT bool AddAudioTrackToMediaStream(
     scoped_refptr<media::AudioCapturerSource> audio_source,
     int sample_rate,
     media::ChannelLayout channel_layout,
     int frames_per_buffer,
     bool is_remote,
     bool is_readonly,
     blink::WebMediaStream* web_media_stream);
 
-// On success returns pointer to the current format of the given video track;
-// returns nullptr on failure (if the argument is invalid or if the format
-// cannot be retrieved at the moment).
-CONTENT_EXPORT const media::VideoCaptureFormat* GetCurrentVideoTrackFormat(
-    const blink::WebMediaStreamTrack& video_track);
-
 // Requests that a refresh frame be sent "soon" (e.g., to resolve picture loss
 // or quality issues).
 CONTENT_EXPORT void RequestRefreshFrameFromVideoTrack(
     const blink::WebMediaStreamTrack& video_track);
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_MEDIA_STREAM_UTILS_H_