Use overloaded operators with QuicTime for addition, subtraction and scalar

net/quic/quic_chromium_packet_reader.cc

 // Copyright (c) 2015 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_chromium_packet_reader.h"
 
 #include "base/location.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 21 matching lines @@
       net_log_(net_log),
       weak_factory_(this) {}
 
 QuicChromiumPacketReader::~QuicChromiumPacketReader() {}
 
 void QuicChromiumPacketReader::StartReading() {
   if (read_pending_)
     return;
 
   if (num_packets_read_ == 0)
-    yield_after_ = clock_->Now().Add(yield_after_duration_);
+    yield_after_ = clock_->Now() + yield_after_duration_;
 
   DCHECK(socket_);
   read_pending_ = true;
   int rv = socket_->Read(read_buffer_.get(), read_buffer_->size(),
                          base::Bind(&QuicChromiumPacketReader::OnReadComplete,
                                     weak_factory_.GetWeakPtr()));
   UMA_HISTOGRAM_BOOLEAN("Net.QuicSession.AsyncRead", rv == ERR_IO_PENDING);
   if (rv == ERR_IO_PENDING) {
     num_packets_read_ = 0;
     return;
@@ skipping 28 matching lines @@
   IPEndPoint peer_address;
   socket_->GetLocalAddress(&local_address);
   socket_->GetPeerAddress(&peer_address);
   if (!visitor_->OnPacket(packet, local_address, peer_address))
     return;
 
   StartReading();
 }
 
 }  // namespace net