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

webrtc/examples/peerconnection/server/peer_channel.cc

Index: webrtc/examples/peerconnection/server/peer_channel.cc
diff --git a/webrtc/examples/peerconnection/server/peer_channel.cc b/webrtc/examples/peerconnection/server/peer_channel.cc
index 150e5dec97b1a434b5c77508528c637a258b82b7..5e173cd4602a64a91c7460acf14562a5a8624c3f 100644
--- a/webrtc/examples/peerconnection/server/peer_channel.cc
+++ b/webrtc/examples/peerconnection/server/peer_channel.cc
@@ -19,6 +19,7 @@
 #include "webrtc/examples/peerconnection/server/data_socket.h"
 #include "webrtc/examples/peerconnection/server/utils.h"
 #include "webrtc/base/stringutils.h"
+#include "webrtc/base/urlencode.h"
 
 using rtc::sprintfn;
 
@@ -59,7 +60,7 @@ ChannelMember::ChannelMember(DataSocket* socket)
   assert(socket);
   assert(socket->method() == DataSocket::GET);
   assert(socket->PathEquals("/sign_in"));
-  name_ = socket->request_arguments();  // TODO: urldecode
+  name_ = rtc::UrlDecodeString(socket->request_arguments());
   if (name_.empty())
     name_ = "peer_" + int2str(id_);
   else if (name_.length() > kMaxNameLength)