Enable cpplint for webrtc/examples and fix all uncovered cpplint errors.

webrtc/examples/peerconnection/client/peer_connection_client.cc

 /*
  *  Copyright 2012 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 25 matching lines @@
   return sock;
 #elif defined(WEBRTC_POSIX)
   rtc::Thread* thread = rtc::Thread::Current();
   ASSERT(thread != NULL);
   return thread->socketserver()->CreateAsyncSocket(family, SOCK_STREAM);
 #else
 #error Platform not supported.
 #endif
 }
 
-}
+}  // namespace
 
 PeerConnectionClient::PeerConnectionClient()
   : callback_(NULL),
     resolver_(NULL),
     state_(NOT_CONNECTED),
     my_id_(-1) {
 }
 
 PeerConnectionClient::~PeerConnectionClient() {
 }
@@ skipping 448 matching lines @@
       Close();
       callback_->OnDisconnected();
     }
   }
 }
 
 void PeerConnectionClient::OnMessage(rtc::Message* msg) {
   // ignore msg; there is currently only one supported message ("retry")
   DoConnect();
 }