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

components/sessions/core/base_session_service_test_helper.cc

 // 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.
 
-#include "components/sessions/base_session_service_test_helper.h"
+#include "components/sessions/core/base_session_service_test_helper.h"
 
-#include "components/sessions/base_session_service.h"
-#include "components/sessions/session_backend.h"
+#include "components/sessions/core/base_session_service.h"
+#include "components/sessions/core/session_backend.h"
 
 namespace sessions {
 
 BaseSessionServiceTestHelper::BaseSessionServiceTestHelper(
     BaseSessionService* base_session_service)
     : base_session_service_(base_session_service) {
   CHECK(base_session_service);
 }
 
 BaseSessionServiceTestHelper::~BaseSessionServiceTestHelper() {
 }
 
 void BaseSessionServiceTestHelper::RunTaskOnBackendThread(
     const tracked_objects::Location& from_here,
     const base::Closure& task) {
   base_session_service_->RunTaskOnBackendThread(from_here, task);
 }
 
 bool BaseSessionServiceTestHelper::ProcessedAnyCommands() {
   return base_session_service_->backend_->inited() ||
          !base_session_service_->pending_commands().empty();
 }
 
 bool BaseSessionServiceTestHelper::ReadLastSessionCommands(
     ScopedVector<SessionCommand>* commands) {
   return base_session_service_->backend_->ReadLastSessionCommandsImpl(commands);
 }
 
 }  // namespace sessions