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

net/quic/quic_bandwidth.h

 // 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.
 //
 // QuicBandwidth represents a bandwidth, stored in bits per second resolution.
 
 #ifndef NET_QUIC_QUIC_BANDWIDTH_H_
 #define NET_QUIC_QUIC_BANDWIDTH_H_
 
 #include <stdint.h>
@@ skipping 34 matching lines @@
   int64_t ToBytesPerSecond() const;
 
   int64_t ToKBytesPerSecond() const;
 
   QuicByteCount ToBytesPerPeriod(QuicTime::Delta time_period) const;
 
   int64_t ToKBytesPerPeriod(QuicTime::Delta time_period) const;
 
   bool IsZero() const;
 
-  QuicBandwidth Add(const QuicBandwidth& delta) const WARN_UNUSED_RESULT;
+  QuicBandwidth Add(QuicBandwidth delta) const WARN_UNUSED_RESULT;
 
-  QuicBandwidth Subtract(const QuicBandwidth& delta) const WARN_UNUSED_RESULT;
+  QuicBandwidth Subtract(QuicBandwidth delta) const WARN_UNUSED_RESULT;
 
   QuicBandwidth Scale(float scale_factor) const WARN_UNUSED_RESULT;
 
   QuicTime::Delta TransferTime(QuicByteCount bytes) const;
 
  private:
   explicit QuicBandwidth(int64_t bits_per_second);
   int64_t bits_per_second_;
 };
 
@@ skipping 12 matching lines @@
 }
 inline bool operator<=(QuicBandwidth lhs, QuicBandwidth rhs) {
   return !(rhs < lhs);
 }
 inline bool operator>=(QuicBandwidth lhs, QuicBandwidth rhs) {
   return !(lhs < rhs);
 }
 
 }  // namespace net
 #endif  // NET_QUIC_QUIC_BANDWIDTH_H_