[chromeos] Remove dependencies of StatisticsProvider on chrome.

chromeos/chromeos_constants.cc

+// Copyright 2013 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 "chromeos/chromeos_constants.h"
+
+#define FPL FILE_PATH_LITERAL
+
+namespace chromeos {
+
+const base::FilePath::CharType kDriveCacheDirname[] = FPL("GCache");
+const char kOemDeviceRequisitionKey[] = "oem_device_requisition";
+const char kOemIsEnterpriseManagedKey[] = "oem_enterprise_managed";
+const char kOemCanExitEnterpriseEnrollmentKey[] = "oem_can_exit_enrollment";
+const char kOemKeyboardDrivenOobeKey[] = "oem_keyboard_driven_oobe";
+
+}  // namespace chromeos