Reducing the IPC latency for MSE video decoding

content/renderer/media/android/media_source_delegate.cc

Index: content/renderer/media/android/media_source_delegate.cc
diff --git a/content/renderer/media/android/media_source_delegate.cc b/content/renderer/media/android/media_source_delegate.cc
index 88addced8f214fe52fc74d190e6e32514c3347fe..563240e8009a219d6440fe4ac8cfb40130666e7b 100644
--- a/content/renderer/media/android/media_source_delegate.cc
+++ b/content/renderer/media/android/media_source_delegate.cc
@@ -31,8 +31,8 @@ using blink::WebString;
 namespace {
 
 // The size of the access unit to transfer in an IPC in case of MediaSource.
-// 16: approximately 250ms of content in 60 fps movies.
-const size_t kAccessUnitSizeForMediaSource = 16;
+// 4: approximately 64ms of content in 60 fps movies.
+const size_t kAccessUnitSizeForMediaSource = 4;
 
 const uint8 kVorbisPadding[] = { 0xff, 0xff, 0xff, 0xff };