Introduce a layering in the invalidation component as public and impl

chrome/browser/sync/glue/invalidation_adapter.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 CHROME_BROWSER_SYNC_GLUE_INVALIDATION_ADAPTER_H_
 #define CHROME_BROWSER_SYNC_GLUE_INVALIDATION_ADAPTER_H_
 
-#include "components/invalidation/invalidation.h"
+#include "components/invalidation/public/invalidation.h"
 #include "sync/internal_api/public/base/invalidation_interface.h"
 
 namespace browser_sync {
 
 // Wraps a syncer::Invalidation in the syncer::InvalidationInterface.
 class InvalidationAdapter : public syncer::InvalidationInterface {
  public:
   explicit InvalidationAdapter(const syncer::Invalidation& invalidation);
   ~InvalidationAdapter() override;
 
   // Implementation of InvalidationInterface.
   bool IsUnknownVersion() const override;
   const std::string& GetPayload() const override;
   int64 GetVersion() const override;
   void Acknowledge() override;
   void Drop() override;
 
  private:
   syncer::Invalidation invalidation_;
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_INVALIDATION_ADAPTER_H_