Move common cloud print methods from service/cloud_print to common/cloud_print.

chrome/service/cloud_print/cloud_print_token_store.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/service/cloud_print/cloud_print_token_store.h"
 
 #include "base/lazy_instance.h"
 #include "base/threading/thread_local.h"
 
+namespace cloud_print {
+
 // Keep the global CloudPrintTokenStore in a TLS slot so it is impossible to
 // incorrectly from the wrong thread.
 static base::LazyInstance<base::ThreadLocalPointer<CloudPrintTokenStore> >
     lazy_tls = LAZY_INSTANCE_INITIALIZER;
 
 CloudPrintTokenStore* CloudPrintTokenStore::current() {
   return lazy_tls.Pointer()->Get();
 }
 
 CloudPrintTokenStore::CloudPrintTokenStore() {
   lazy_tls.Pointer()->Set(this);
 }
 
 CloudPrintTokenStore::~CloudPrintTokenStore() {
   lazy_tls.Pointer()->Set(NULL);
 }
 
 void CloudPrintTokenStore::SetToken(const std::string& token) {
   DCHECK(CalledOnValidThread());
   token_ = token;
 }
+
+}  // namespace cloud_print