Introduce a layering in the invalidation component as public and impl

components/invalidation/impl/fake_invalidation_state_tracker.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_INVALIDATION_FAKE_INVALIDATION_STATE_TRACKER_H_
-#define COMPONENTS_INVALIDATION_FAKE_INVALIDATION_STATE_TRACKER_H_
+#ifndef COMPONENTS_INVALIDATION_IMPL_FAKE_INVALIDATION_STATE_TRACKER_H_
+#define COMPONENTS_INVALIDATION_IMPL_FAKE_INVALIDATION_STATE_TRACKER_H_
 
 #include "base/memory/weak_ptr.h"
-#include "components/invalidation/invalidation_state_tracker.h"
+#include "components/invalidation/impl/invalidation_state_tracker.h"
 
 namespace syncer {
 
 // InvalidationStateTracker implementation that simply keeps track of
 // the max versions and invalidation state in memory.
 class FakeInvalidationStateTracker
     : public InvalidationStateTracker,
       public base::SupportsWeakPtr<FakeInvalidationStateTracker> {
  public:
   FakeInvalidationStateTracker();
@@ skipping 11 matching lines @@
   static const int64 kMinVersion;
 
  private:
   std::string invalidator_client_id_;
   std::string bootstrap_data_;
   UnackedInvalidationsMap unacked_invalidations_map_;
 };
 
 }  // namespace syncer
 
-#endif  // COMPONENTS_INVALIDATION_FAKE_INVALIDATION_STATE_TRACKER_H_
+#endif  // COMPONENTS_INVALIDATION_IMPL_FAKE_INVALIDATION_STATE_TRACKER_H_