Revert 94128 - [Sync] Refactor sync datatype error handling.

chrome/browser/sync/api/sync_error.h

-// Copyright (c) 2011 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 CHROME_BROWSER_SYNC_API_SYNC_ERROR_H_
-#define CHROME_BROWSER_SYNC_API_SYNC_ERROR_H_
-#pragma once
-
-#include <string>
-
-#include "base/memory/scoped_ptr.h"
-#include "chrome/browser/sync/syncable/model_type.h"
-
-namespace tracked_objects {
-class Location;
-}  // namespace tracked_objects
-
-// Sync errors are used for debug purposes and handled internally and/or
-// exposed through Chrome's "about:sync" internal page. They are considered
-// unrecoverable for the datatype creating them, and should only be used as
-// such.
-// This class is copy-friendly and thread-safe.
-class SyncError {
- public:
-  // Default constructor refers to "no error", and IsSet() will return false.
-  SyncError();
-
-  // Create a new Sync error triggered by datatype |type| with debug message
-  // |message| from the specified location. IsSet() will return true.
-  // Will print the new error to LOG(ERROR).
-  SyncError(const tracked_objects::Location& location,
-            const std::string& message,
-            syncable::ModelType type);
-
-  // Copy and assign via deep copy.
-  SyncError(const SyncError& other);
-  SyncError& operator=(const SyncError& other);
-
-  // Reset the current error to a new error. May be called irrespective of
-  // whether IsSet() is true. After this is called, IsSet() will return true.
-  // Will print the new error to LOG(ERROR).
-  void Reset(const tracked_objects::Location& location,
-             const std::string& message,
-             syncable::ModelType type);
-
-  // Whether this is a valid error or not.
-  bool IsSet() const;
-
-  // These must only be called if IsSet() is true.
-  const tracked_objects::Location& location() const;
-  const std::string& message() const;
-  const syncable::ModelType type() const;
-
- 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.
-  void Init(const tracked_objects::Location& location,
-            const std::string& message,
-            syncable::ModelType type);
-
-  // Reset the error to it's default (unset) values.
-  void Clear();
-
-  // scoped_ptr is necessary because Location objects aren't assignable.
-  scoped_ptr<tracked_objects::Location> location_;
-  std::string message_;
-  syncable::ModelType type_;
-};
-
-#endif  // CHROME_BROWSER_SYNC_API_SYNC_ERROR_H_