Roll FFMpeg for M26. Fix ffmpeg float audio decoding.

media/webm/webm_stream_parser.cc

Index: media/webm/webm_stream_parser.cc
diff --git a/media/webm/webm_stream_parser.cc b/media/webm/webm_stream_parser.cc
index dfa56c3df0cf9a5666338fb3824decb56cc62a82..ae65420d90ee2e9c0f52bfcc5fc3e8da614dee90 100644
--- a/media/webm/webm_stream_parser.cc
+++ b/media/webm/webm_stream_parser.cc
@@ -352,12 +352,13 @@ int WebMStreamParser::ParseInfoAndTracks(const uint8* data, int size) {
         config_helper.audio_config();
 
     audio_config.Initialize(original_audio_config.codec(),
-                            original_audio_config.bits_per_channel(),
+                            original_audio_config.sample_format(),
                             original_audio_config.channel_layout(),
                             original_audio_config.samples_per_second(),
                             original_audio_config.extra_data(),
                             original_audio_config.extra_data_size(),
-                            is_audio_encrypted, false);
+                            is_audio_encrypted,
+                            false);
 
     FireNeedKey(tracks_parser.audio_encryption_key_id());
   } else {