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

components/sessions/core/session_service_commands.cc

Index: components/sessions/core/session_service_commands.cc
diff --git a/components/sessions/session_service_commands.cc b/components/sessions/core/session_service_commands.cc
similarity index 99%
rename from components/sessions/session_service_commands.cc
rename to components/sessions/core/session_service_commands.cc
index 60be71cebb405df55946e25ea7856f2508e6d4b9..924d314948746dc245610bdf41102e80953a2182 100644
--- a/components/sessions/session_service_commands.cc
+++ b/components/sessions/core/session_service_commands.cc
@@ -2,15 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "components/sessions/session_service_commands.h"
+#include "components/sessions/core/session_service_commands.h"
 
 #include <vector>
 
 #include "base/pickle.h"
-#include "components/sessions/base_session_service_commands.h"
-#include "components/sessions/base_session_service_delegate.h"
-#include "components/sessions/session_command.h"
-#include "components/sessions/session_types.h"
+#include "components/sessions/core/base_session_service_commands.h"
+#include "components/sessions/core/base_session_service_delegate.h"
+#include "components/sessions/core/session_command.h"
+#include "components/sessions/core/session_types.h"
 
 namespace sessions {