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

components/sessions/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/base_session_service.h"
-#include "components/sessions/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