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

components/sync_driver/tab_node_pool.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_SYNC_DRIVER_TAB_NODE_POOL_H_
 #define COMPONENTS_SYNC_DRIVER_TAB_NODE_POOL_H_
 
 #include <map>
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
-#include "components/sessions/session_id.h"
+#include "components/sessions/core/session_id.h"
 #include "sync/api/sync_change_processor.h"
 
 namespace syncer {
 class SyncChangeProcessor;
 }
 
 namespace browser_sync {
 
 // A pool for managing free/used tab sync nodes for the *local* session.
 // Performs lazy creation of sync nodes when necessary.
@@ skipping 131 matching lines @@
   // The machine tag associated with this tab pool. Used in the title of new
   // sync nodes.
   std::string machine_tag_;
 
   DISALLOW_COPY_AND_ASSIGN(TabNodePool);
 };
 
 }  // namespace browser_sync
 
 #endif  // COMPONENTS_SYNC_DRIVER_TAB_NODE_POOL_H_