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

net/quic/quic_bandwidth.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/quic/quic_bandwidth.h"
 
 #include <stdint.h>
 
 #include "base/logging.h"
 #include "net/quic/quic_time.h"
@@ skipping 71 matching lines @@
 
 int64_t QuicBandwidth::ToKBytesPerPeriod(QuicTime::Delta time_period) const {
   return ToKBytesPerSecond() * time_period.ToMicroseconds() /
          kNumMicrosPerSecond;
 }
 
 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_);
 }
 
 QuicBandwidth QuicBandwidth::Scale(float scale_factor) const {
   return QuicBandwidth(static_cast<int64_t>(bits_per_second_ * scale_factor));
 }
 
 QuicTime::Delta QuicBandwidth::TransferTime(QuicByteCount bytes) const {
   if (bits_per_second_ == 0) {
     return QuicTime::Delta::Zero();
   }
   return QuicTime::Delta::FromMicroseconds(bytes * 8 * kNumMicrosPerSecond /
                                            bits_per_second_);
 }
 
 }  // namespace net