[Desktop] Add diagnostics about loading the refresh tokens.

components/signin/core/browser/signin_internals_util.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_INTERNALS_UTIL_H_
 #define COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_INTERNALS_UTIL_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 51 matching lines @@
 // Returns the name of a SigninStatus field.
 std::string SigninStatusFieldToString(UntimedSigninStatusField field);
 std::string SigninStatusFieldToString(TimedSigninStatusField field);
 
 // An Observer class for authentication and token diagnostic information.
 class SigninDiagnosticsObserver {
  public:
   // Credentials and signin related changes.
   virtual void NotifySigninValueChanged(const TimedSigninStatusField& field,
                                         const std::string& value) {}
-  // OAuth tokens related changes.
-  virtual void NotifyTokenReceivedSuccess(const std::string& token_name,
-                                          const std::string& token,
-                                          bool update_time) {}
-  virtual void NotifyTokenReceivedFailure(const std::string& token_name,
-                                          const std::string& error) {}
-  virtual void NotifyClearStoredToken(const std::string& token_name) {}};
+};
 
 // Gets the first 6 hex characters of the SHA256 hash of the passed in string.
 // These are enough to perform equality checks across a single users tokens,
 // while preventing outsiders from reverse-engineering the actual token from
 // the displayed value.
 // Note that for readability (in about:signin-internals), an empty string
 // is not hashed, but simply returned as an empty string.
 std::string GetTruncatedHash(const std::string& str);
 
 } // namespace signin_internals_util
 
 #endif  // COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_INTERNALS_UTIL_H_