[Sync] Move some things from driver to base.

components/sync/driver/invalidation_adapter.h

Index: components/sync/driver/invalidation_adapter.h
diff --git a/components/sync/driver/invalidation_adapter.h b/components/sync/driver/invalidation_adapter.h
deleted file mode 100644
index cf7212c2e894e120cc909a9d8c2f24da2bf1d0ea..0000000000000000000000000000000000000000
--- a/components/sync/driver/invalidation_adapter.h
+++ /dev/null
@@ -1,36 +0,0 @@
-// 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_INVALIDATION_ADAPTER_H_
-#define COMPONENTS_SYNC_DRIVER_INVALIDATION_ADAPTER_H_
-
-#include <stdint.h>
-
-#include <string>
-
-#include "components/invalidation/public/invalidation.h"
-#include "components/sync/base/invalidation_interface.h"
-
-namespace syncer {
-
-// Wraps a Invalidation in the InvalidationInterface.
-class InvalidationAdapter : public InvalidationInterface {
- public:
-  explicit InvalidationAdapter(const Invalidation& invalidation);
-  ~InvalidationAdapter() override;
-
-  // Implementation of InvalidationInterface.
-  bool IsUnknownVersion() const override;
-  const std::string& GetPayload() const override;
-  int64_t GetVersion() const override;
-  void Acknowledge() override;
-  void Drop() override;
-
- private:
-  Invalidation invalidation_;
-};
-
-}  // namespace syncer
-
-#endif  // COMPONENTS_SYNC_DRIVER_INVALIDATION_ADAPTER_H_