Enable cpplint for webrtc/modules/pacing and fix all uncovered cpplint errors.

webrtc/modules/pacing/packet_router.cc

 /*
  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 22 matching lines @@
 
 bool SendFeedback(rtcp::TransportFeedback* packet,
                   std::list<RtpRtcp*>* rtp_modules) {
   for (auto* rtp_module : *rtp_modules) {
     packet->WithPacketSenderSsrc(rtp_module->SSRC());
     if (rtp_module->SendFeedbackPacket(*packet))
       return true;
   }
   return false;
 }
-}
+}  // namespace
 
 PacketRouter::PacketRouter() : transport_seq_(0) {
   pacer_thread_checker_.DetachFromThread();
 }
 
 PacketRouter::~PacketRouter() {
   RTC_DCHECK(send_rtp_modules_.empty());
   RTC_DCHECK(recv_rtp_modules_.empty());
 }
 
@@ skipping 72 matching lines @@
   RTC_DCHECK(pacer_thread_checker_.CalledOnValidThread());
   rtc::CritScope cs(&modules_crit_);
   if (::webrtc::SendFeedback(packet, &recv_rtp_modules_))
     return true;
   if (::webrtc::SendFeedback(packet, &send_rtp_modules_))
     return true;
   return false;
 }
 
 }  // namespace webrtc