[Sync] Implementation of model association for passwords using sync API

sync/api/sync_error.h

 // Copyright 2012 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 SYNC_API_SYNC_ERROR_H_
 #define SYNC_API_SYNC_ERROR_H_
 
 #include <iosfwd>
 #include <string>
 
@@ skipping 56 matching lines @@
   bool IsSet() const;
 
   // These must only be called if IsSet() is true.
   const tracked_objects::Location& location() const;
   const std::string& message() const;
   ModelType model_type() const;
   ErrorType error_type() const;
 
   // Returns empty string is IsSet() is false.
   std::string ToString() const;
+
+  static void LogDataLoadFailure(ModelType model_type);

[Ilya Sherman, 2013/11/19 22:49:04]

nit: Please document this method, and leave a blank line between this and the
"private:" access specifier.

[lipalani1, 2013/11/26 23:31:35]

Done.

  private:
   // Print error information to log.
   void PrintLogError() const;
 
   // Make a copy of a SyncError. If other.IsSet() == false, this->IsSet() will
   // now return false.
   void Copy(const SyncError& other);
 
   // Initialize the local error data with the specified error data. After this
   // is called, IsSet() will return true.
@@ skipping 11 matching lines @@
   ModelType model_type_;
   ErrorType error_type_;
 };
 
 // gmock printer helper.
 SYNC_EXPORT void PrintTo(const SyncError& sync_error, std::ostream* os);
 
 }  // namespace syncer
 
 #endif  // SYNC_API_SYNC_ERROR_H_