Refactor TokenValidatorImpl into a base class + implementation.

remoting/host/token_validator_factory_impl.h

Index: remoting/host/token_validator_factory_impl.h
diff --git a/remoting/host/token_validator_factory_impl.h b/remoting/host/token_validator_factory_impl.h
index b8fbb0fb7a0f43d0a13029582d5e07e1fdd192c1..51a51f129c07a5ca95ffbbc4062500312a0c1951 100644
--- a/remoting/host/token_validator_factory_impl.h
+++ b/remoting/host/token_validator_factory_impl.h
@@ -10,24 +10,11 @@
 
 #include "base/basictypes.h"
 #include "net/url_request/url_request_context_getter.h"
+#include "remoting/host/token_validator_base.h"
 #include "remoting/protocol/third_party_host_authenticator.h"
 
 namespace remoting {
 
-struct ThirdPartyAuthConfig {
-  inline bool is_empty() const {
-    return token_url.is_empty() && token_validation_url.is_empty();
-  }
-
-  inline bool is_valid() const {
-    return token_url.is_valid() && token_validation_url.is_valid();
-  }
-
-  GURL token_url;
-  GURL token_validation_url;
-  std::string token_validation_cert_issuer;
-};
-
 // This class dispenses |TokenValidator| implementations that use a UrlFetcher
 // to contact a |token_validation_url| and exchange the |token| for a
 // |shared_secret|.