Make AudioTimestampHelper::TimeToFrames() more accurate

media/base/audio_timestamp_helper.cc

Index: media/base/audio_timestamp_helper.cc
diff --git a/media/base/audio_timestamp_helper.cc b/media/base/audio_timestamp_helper.cc
index 8694ae329a003aed933cccba44429941c7305457..0d62c125b75737d2cedf1df3523158e9d67a1914 100644
--- a/media/base/audio_timestamp_helper.cc
+++ b/media/base/audio_timestamp_helper.cc
@@ -20,7 +20,7 @@ base::TimeDelta AudioTimestampHelper::FramesToTime(int64_t frames,
 // static
 int64_t AudioTimestampHelper::TimeToFrames(base::TimeDelta time,
                                            int samples_per_second) {
-  return time.InSecondsF() * samples_per_second;
+  return std::round(time.InSecondsF() * samples_per_second);
 }
 
 AudioTimestampHelper::AudioTimestampHelper(int samples_per_second)