Change memmove's back into memcpy's. No functional change. Not flag protected.

net/quic/quic_packet_creator.cc

Index: net/quic/quic_packet_creator.cc
diff --git a/net/quic/quic_packet_creator.cc b/net/quic/quic_packet_creator.cc
index efaf1136b216def9ec307c27c8cced55c339841a..07815219fd5d5931b9e583084b09d99f865a9c25 100644
--- a/net/quic/quic_packet_creator.cc
+++ b/net/quic/quic_packet_creator.cc
@@ -278,7 +278,7 @@ void QuicPacketCreator::CopyToBuffer(QuicIOVector iov,
 
   const char* src = static_cast<char*>(iov.iov[iovnum].iov_base) + iov_offset;
   while (true) {
-    memmove(buffer, src, copy_len);
+    memcpy(buffer, src, copy_len);
     length -= copy_len;
     buffer += copy_len;
     if (length == 0 || ++iovnum >= iov.iov_count) {