[Chromoting] Move SharedSecretHash from Me2MeHostAuthenticatorFactory to AuthenticationMethod.

remoting/protocol/me2me_host_authenticator_factory.h

Index: remoting/protocol/me2me_host_authenticator_factory.h
diff --git a/remoting/protocol/me2me_host_authenticator_factory.h b/remoting/protocol/me2me_host_authenticator_factory.h
index a2cf3e5c5b0c66a3a7c4c275448e70e03c41bd0a..b0f9b4e3738d5ed0e21f6ba4ed9998246015e33b 100644
--- a/remoting/protocol/me2me_host_authenticator_factory.h
+++ b/remoting/protocol/me2me_host_authenticator_factory.h
@@ -20,17 +20,6 @@ class RSAPrivateKey;
 namespace remoting {
 namespace protocol {
 
-// SharedSecretHash stores hash of a host secret paired with the type
-// of the hashing function.
-struct SharedSecretHash {
-  AuthenticationMethod::HashFunction hash_function;
-  std::string value;
-
-  // Parse string representation of a shared secret hash. The |as_string|
-  // must be in form "<hash_function>:<hash_value_base64>".
-  bool Parse(const std::string& as_string);
-};
-
 class Me2MeHostAuthenticatorFactory : public AuthenticatorFactory {
  public:
   // Doesn't take ownership of |local_private_key|.