Move all core files in //components/sessions into core/ subdir

components/sessions/core/base_session_service.h

 // Copyright 2012 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_SESSIONS_BASE_SESSION_SERVICE_H_
-#define COMPONENTS_SESSIONS_BASE_SESSION_SERVICE_H_
+#ifndef COMPONENTS_SESSIONS_CORE_BASE_SESSION_SERVICE_H_
+#define COMPONENTS_SESSIONS_CORE_BASE_SESSION_SERVICE_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/weak_ptr.h"
 #include "base/task/cancelable_task_tracker.h"
-#include "components/sessions/sessions_export.h"
+#include "components/sessions/core/sessions_export.h"
 #include "url/gurl.h"
 
 
 namespace sessions {
 class BaseSessionServiceDelegate;
 class SerializedNavigationEntry;
 class SessionCommand;
 class SessionBackend;
 
 // BaseSessionService is the super class of both tab restore service and
@@ skipping 101 matching lines @@
   base::SequencedWorkerPool::SequenceToken sequence_token_;
 
   // Used to invoke Save.
   base::WeakPtrFactory<BaseSessionService> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BaseSessionService);
 };
 
 }  // namespace sessions
 
-#endif  // COMPONENTS_SESSIONS_BASE_SESSION_SERVICE_H_
+#endif  // COMPONENTS_SESSIONS_CORE_BASE_SESSION_SERVICE_H_