Add IssueAuthToken and unit tests to GaiaAuthenticator2.

chrome/common/net/gaia/gaia_auth_consumer.h

Index: chrome/common/net/gaia/gaia_auth_consumer.h
diff --git a/chrome/common/net/gaia/gaia_auth_consumer.h b/chrome/common/net/gaia/gaia_auth_consumer.h
index 31302c7ef6f22ac6a885f64bcb60646b26076441..b7b215cd8f1e7155836d3a6ccaa7e53deab0cf72 100644
--- a/chrome/common/net/gaia/gaia_auth_consumer.h
+++ b/chrome/common/net/gaia/gaia_auth_consumer.h
@@ -36,15 +36,15 @@ class GaiaAuthConsumer {
     std::string data;  // Full contents of ClientLogin return.
   };
 
-  enum ClientLoginErrorCode {
+  enum GaiaAuthErrorCode {
     NETWORK_ERROR,
     REQUEST_CANCELED,
     TWO_FACTOR,  // Callers can treat this as a success.
     PERMISSION_DENIED
   };
 
-  struct ClientLoginError {
-    inline bool operator==(const ClientLoginError &b) const {
+  struct GaiaAuthError {
+    inline bool operator==(const GaiaAuthError &b) const {
       if (code != b.code) {
         return false;
       }
@@ -54,14 +54,20 @@ class GaiaAuthConsumer {
       return true;
     }
 
-    ClientLoginErrorCode code;
+    GaiaAuthErrorCode code;
     int network_error;  // This field is only valid if NETWORK_ERROR occured.
     std::string data;  // TODO(chron): Remove this field. Should preparse data.
   };
 
   virtual ~GaiaAuthConsumer() {}
-  virtual void OnClientLoginFailure(const ClientLoginError& error) = 0;
-  virtual void OnClientLoginSuccess(const ClientLoginResult& result) = 0;
+
+  virtual void OnClientLoginSuccess(const ClientLoginResult& result) {}
+  virtual void OnClientLoginFailure(const GaiaAuthError& error) {}
+
+  virtual void OnIssueAuthTokenSuccess(const std::string& service,
+                                       const std::string& auth_token) {}
+  virtual void OnIssueAuthTokenFailure(const std::string& service,
+                                       const GaiaAuthError& error) {}
 };
 
 #endif  // CHROME_COMMON_NET_GAIA_GAIA_AUTH_CONSUMER_H_