Move IsStringASCII/UTF8 to base namespace.

remoting/protocol/me2me_host_authenticator_factory.cc

Index: remoting/protocol/me2me_host_authenticator_factory.cc
diff --git a/remoting/protocol/me2me_host_authenticator_factory.cc b/remoting/protocol/me2me_host_authenticator_factory.cc
index 24c0ca4b8e58c4090047651d0937703e535a07b3..91ef82d5d441b38bb59458b81d8e0e9cdbd1e090 100644
--- a/remoting/protocol/me2me_host_authenticator_factory.cc
+++ b/remoting/protocol/me2me_host_authenticator_factory.cc
@@ -137,7 +137,7 @@ scoped_ptr<Authenticator> Me2MeHostAuthenticatorFactory::CreateAuthenticator(
 
   // Verify that the client's jid is an ASCII string, and then check that the
   // client JID has the expected prefix. Comparison is case insensitive.
-  if (!IsStringASCII(remote_jid) ||
+  if (!base::IsStringASCII(remote_jid) ||
       !StartsWithASCII(remote_jid, remote_jid_prefix + '/', false)) {
     LOG(ERROR) << "Rejecting incoming connection from " << remote_jid;
     return scoped_ptr<Authenticator>(new RejectingAuthenticator());