Move QuicClock to quic/platform/

net/tools/quic/quic_epoll_clock.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/tools/quic/quic_epoll_clock.h"
-
-#include "net/tools/epoll_server/epoll_server.h"
-
-namespace net {
-
-QuicEpollClock::QuicEpollClock(EpollServer* epoll_server)
-    : epoll_server_(epoll_server) {}
-
-QuicEpollClock::~QuicEpollClock() {}
-
-QuicTime QuicEpollClock::ApproximateNow() const {
-  return QuicTime::Zero() + QuicTime::Delta::FromMicroseconds(
-                                epoll_server_->ApproximateNowInUsec());
-}
-
-QuicTime QuicEpollClock::Now() const {
-  return QuicTime::Zero() +
-         QuicTime::Delta::FromMicroseconds(epoll_server_->NowInUsec());
-}
-
-QuicWallTime QuicEpollClock::WallNow() const {
-  return QuicWallTime::FromUNIXMicroseconds(
-      epoll_server_->ApproximateNowInUsec());
-}
-
-QuicTime QuicEpollClock::ConvertWallTimeToQuicTime(
-    const QuicWallTime& walltime) const {
-  return QuicTime::Zero() +
-         QuicTime::Delta::FromMicroseconds(walltime.ToUNIXMicroseconds());
-}
-
-}  // namespace net