[Sync] Create //components/sync/device_info.

components/sync/driver/local_device_info_provider_impl.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_SYNC_DRIVER_LOCAL_DEVICE_INFO_PROVIDER_IMPL_H_
-#define COMPONENTS_SYNC_DRIVER_LOCAL_DEVICE_INFO_PROVIDER_IMPL_H_
-
-#include <string>
-
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "base/threading/non_thread_safe.h"
-#include "components/sync/driver/device_info.h"
-#include "components/sync/driver/local_device_info_provider.h"
-#include "components/version_info/version_info.h"
-
-namespace browser_sync {
-
-class LocalDeviceInfoProviderImpl : public sync_driver::LocalDeviceInfoProvider,
-                                    public base::NonThreadSafe {
- public:
-  LocalDeviceInfoProviderImpl(version_info::Channel channel,
-                              const std::string& version,
-                              bool is_tablet);
-  ~LocalDeviceInfoProviderImpl() override;
-
-  // LocalDeviceInfoProvider implementation.
-  const sync_driver::DeviceInfo* GetLocalDeviceInfo() const override;
-  std::string GetSyncUserAgent() const override;
-  std::string GetLocalSyncCacheGUID() const override;
-  void Initialize(
-      const std::string& cache_guid,
-      const std::string& signin_scoped_device_id,
-      const scoped_refptr<base::TaskRunner>& blocking_task_runner) override;
-  std::unique_ptr<Subscription> RegisterOnInitializedCallback(
-      const base::Closure& callback) override;
-  void Clear() override;
-
- private:
-  void InitializeContinuation(const std::string& guid,
-                              const std::string& signin_scoped_device_id,
-                              const std::string& session_name);
-
-  // The channel (CANARY, DEV, BETA, etc.) of the current client.
-  const version_info::Channel channel_;
-
-  // The version string for the current client.
-  const std::string version_;
-
-  // Whether this device has a tablet form factor (only used on Android
-  // devices).
-  const bool is_tablet_;
-
-  std::string cache_guid_;
-  std::unique_ptr<sync_driver::DeviceInfo> local_device_info_;
-  base::CallbackList<void(void)> callback_list_;
-  base::WeakPtrFactory<LocalDeviceInfoProviderImpl> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(LocalDeviceInfoProviderImpl);
-};
-
-}  // namespace browser_sync
-
-#endif  // COMPONENTS_SYNC_DRIVER_LOCAL_DEVICE_INFO_PROVIDER_IMPL_H_