Always round up to the next full frame when sizing WebAudio decodes.

content/renderer/media/audio_decoder.cc

Index: content/renderer/media/audio_decoder.cc
diff --git a/content/renderer/media/audio_decoder.cc b/content/renderer/media/audio_decoder.cc
index dd9f1fafa0d1d34e6353d37735340e4c4ada650e..e853c24160b00d0a8fc3fe07def3284cfd651e7a 100644
--- a/content/renderer/media/audio_decoder.cc
+++ b/content/renderer/media/audio_decoder.cc
@@ -41,7 +41,7 @@ bool DecodeAudioFileData(
 
   size_t number_of_channels = reader.channels();
   double file_sample_rate = reader.sample_rate();
-  size_t number_of_frames = static_cast<size_t>(reader.number_of_frames());
+  size_t number_of_frames = static_cast<size_t>(reader.GetNumberOfFrames());
 
   // Apply sanity checks to make sure crazy values aren't coming out of
   // FFmpeg.