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

webrtc/examples/peerconnection/client/defaults.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 32 matching lines @@
 std::string GetPeerConnectionString() {
   return GetEnvVarOrDefault("WEBRTC_CONNECT", "stun:stun.l.google.com:19302");
 }
 
 std::string GetDefaultServerName() {
   return GetEnvVarOrDefault("WEBRTC_SERVER", "localhost");
 }
 
 std::string GetPeerName() {
   char computer_name[256];
-  if (gethostname(computer_name, arraysize(computer_name)) != 0)
-    strcpy(computer_name, "host");
   std::string ret(GetEnvVarOrDefault("USERNAME", "user"));
   ret += '@';
-  ret += computer_name;
+  if (gethostname(computer_name, arraysize(computer_name)) == 0) {
+    ret += computer_name;
+  } else {
+    ret += "host";
+  }
   return ret;
 }