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

webrtc/examples/peerconnection/client/defaults.cc

Index: webrtc/examples/peerconnection/client/defaults.cc
diff --git a/webrtc/examples/peerconnection/client/defaults.cc b/webrtc/examples/peerconnection/client/defaults.cc
index f70aa72e3da5b4aa5814078d5a7e05631356a547..a2501c718f62b0a4642a9e3c594a03db2a46d12d 100644
--- a/webrtc/examples/peerconnection/client/defaults.cc
+++ b/webrtc/examples/peerconnection/client/defaults.cc
@@ -50,10 +50,12 @@ std::string GetDefaultServerName() {
 
 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;
 }