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

chrome/service/cloud_print/cloud_print_token_store.cc

Index: chrome/service/cloud_print/cloud_print_token_store.cc
diff --git a/chrome/service/cloud_print/cloud_print_token_store.cc b/chrome/service/cloud_print/cloud_print_token_store.cc
index dacbf942cf6e8daad2d36cc977b53562a8581fd4..1fb39b026cbe44640c4932a02dcb9f0fac8ab8e2 100644
--- a/chrome/service/cloud_print/cloud_print_token_store.cc
+++ b/chrome/service/cloud_print/cloud_print_token_store.cc
@@ -7,6 +7,8 @@
 #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> >
@@ -28,3 +30,5 @@ void CloudPrintTokenStore::SetToken(const std::string& token) {
   DCHECK(CalledOnValidThread());
   token_ = token;
 }
+
+}  // namespace cloud_print