Introduce a layering in the invalidation component as public and impl

components/invalidation/impl/non_blocking_invalidator.h

Index: components/invalidation/impl/non_blocking_invalidator.h
diff --git a/components/invalidation/non_blocking_invalidator.h b/components/invalidation/impl/non_blocking_invalidator.h
similarity index 87%
rename from components/invalidation/non_blocking_invalidator.h
rename to components/invalidation/impl/non_blocking_invalidator.h
index 73db2802c1179652af5cc16fb1e5c622e6249d97..22e7f4ee59613684333cd114e0a9ca71095c7e13 100644
--- a/components/invalidation/non_blocking_invalidator.h
+++ b/components/invalidation/impl/non_blocking_invalidator.h
@@ -5,8 +5,8 @@
 // An implementation of SyncNotifier that wraps InvalidationNotifier
 // on its own thread.
 
-#ifndef COMPONENTS_INVALIDATION_NON_BLOCKING_INVALIDATOR_H_
-#define COMPONENTS_INVALIDATION_NON_BLOCKING_INVALIDATOR_H_
+#ifndef COMPONENTS_INVALIDATION_IMPL_NON_BLOCKING_INVALIDATOR_H_
+#define COMPONENTS_INVALIDATION_IMPL_NON_BLOCKING_INVALIDATOR_H_
 
 #include <string>
 
@@ -15,12 +15,12 @@
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
-#include "components/invalidation/invalidation_export.h"
-#include "components/invalidation/invalidation_state_tracker.h"
-#include "components/invalidation/invalidator.h"
-#include "components/invalidation/invalidator_registrar.h"
-#include "components/invalidation/invalidator_state.h"
-#include "components/invalidation/unacked_invalidation_set.h"
+#include "components/invalidation/impl/invalidation_state_tracker.h"
+#include "components/invalidation/impl/invalidator.h"
+#include "components/invalidation/impl/invalidator_registrar.h"
+#include "components/invalidation/impl/unacked_invalidation_set.h"
+#include "components/invalidation/public/invalidation_export.h"
+#include "components/invalidation/public/invalidator_state.h"
 #include "jingle/notifier/base/notifier_options.h"
 
 namespace base {
@@ -109,4 +109,4 @@ class INVALIDATION_EXPORT_PRIVATE NonBlockingInvalidator
 
 }  // namespace syncer
 
-#endif  // COMPONENTS_INVALIDATION_NON_BLOCKING_INVALIDATOR_H_
+#endif  // COMPONENTS_INVALIDATION_IMPL_NON_BLOCKING_INVALIDATOR_H_