Pass QuicTime, QuicTime::Delta, and QuicBandwidth exclusively by value. Not flag protected. No func…

net/quic/quic_bandwidth.cc

Index: net/quic/quic_bandwidth.cc
diff --git a/net/quic/quic_bandwidth.cc b/net/quic/quic_bandwidth.cc
index b7fe66dfd2355c7990b6e19487df122198ee35cb..c1f9c4895da32c73723973d4e914722744bad00c 100644
--- a/net/quic/quic_bandwidth.cc
+++ b/net/quic/quic_bandwidth.cc
@@ -89,11 +89,11 @@ bool QuicBandwidth::IsZero() const {
   return (bits_per_second_ == 0);
 }
 
-QuicBandwidth QuicBandwidth::Add(const QuicBandwidth& delta) const {
+QuicBandwidth QuicBandwidth::Add(QuicBandwidth delta) const {
   return QuicBandwidth(bits_per_second_ + delta.bits_per_second_);
 }
 
-QuicBandwidth QuicBandwidth::Subtract(const QuicBandwidth& delta) const {
+QuicBandwidth QuicBandwidth::Subtract(QuicBandwidth delta) const {
   return QuicBandwidth(bits_per_second_ - delta.bits_per_second_);
 }