Clean up handling of invalid HWID when running ChromeOS in VMs

chromeos/system/statistics_provider.h

 // 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.
 
 #ifndef CHROMEOS_SYSTEM_STATISTICS_PROVIDER_H_
 #define CHROMEOS_SYSTEM_STATISTICS_PROVIDER_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
@@ skipping 25 matching lines @@
 // firmware with MP and developer keys respectively, nonchrome indicates the
 // machine doesn't run on Chrome OS firmware. See crossystem source for more
 // details.
 CHROMEOS_EXPORT extern const char kFirmwareTypeKey[];
 CHROMEOS_EXPORT extern const char kFirmwareTypeValueDeveloper[];
 CHROMEOS_EXPORT extern const char kFirmwareTypeValueNonchrome[];
 CHROMEOS_EXPORT extern const char kFirmwareTypeValueNormal[];
 
 // HWID key.
 CHROMEOS_EXPORT extern const char kHardwareClassKey[];
+CHROMEOS_EXPORT extern const char kHardwareClassValueVM[];
 
 // System vendor key.
 // The value is used to check if Chrome is running on a VM or a real Chrome OS
 // device. On QEMU VMs this value is QEMU.
 CHROMEOS_EXPORT extern const char kSystemVendorKey[];
 
 // OEM customization flag that permits exiting enterprise enrollment flow in
 // OOBE when 'oem_enterprise_managed' flag is set.
 CHROMEOS_EXPORT extern const char kOemCanExitEnterpriseEnrollmentKey[];
 
@@ skipping 62 matching lines @@
   static void SetTestProvider(StatisticsProvider* test_provider);
 
  protected:
   virtual ~StatisticsProvider() {}
 };
 
 }  // namespace system
 }  // namespace chromeos
 
 #endif  // CHROMEOS_SYSTEM_STATISTICS_PROVIDER_H_