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

webrtc/examples/peerconnection/client/linux/main.cc

Index: webrtc/examples/peerconnection/client/linux/main.cc
diff --git a/webrtc/examples/peerconnection/client/linux/main.cc b/webrtc/examples/peerconnection/client/linux/main.cc
index cf88c36fbbf430f7692d9b66d27d18575fb11f31..d7f5c5932f63d9d02f60de8feb93c5176af69157 100644
--- a/webrtc/examples/peerconnection/client/linux/main.cc
+++ b/webrtc/examples/peerconnection/client/linux/main.cc
@@ -97,9 +97,11 @@ int main(int argc, char* argv[]) {
 
   thread->set_socketserver(NULL);
   // TODO: Run the Gtk main loop to tear down the connection.

[joachim, 2015/12/08 23:23:44]

This fails with "Missing username in TODO", who should I enter?

[kjellander_webrtc, 2015/12/09 14:41:47]

henrike in this case too, i.e. TODO(henrike):

-  //while (gtk_events_pending()) {
-  //  gtk_main_iteration();
-  //}
+  /*
+  while (gtk_events_pending()) {
+    gtk_main_iteration();
+  }
+  */
   rtc::CleanupSSL();
   return 0;
 }