chromeos: Move files in //ash/common to //ash, part 1

ash/system/devicetype_utils.h

Index: ash/system/devicetype_utils.h
diff --git a/ash/common/system/chromeos/devicetype_utils.h b/ash/system/devicetype_utils.h
similarity index 82%
rename from ash/common/system/chromeos/devicetype_utils.h
rename to ash/system/devicetype_utils.h
index a84fd871fe0268666bbb985cc904829acd9cbf36..d958864a81c64d87ce60848213ce6ecd9b1c1f42 100644
--- a/ash/common/system/chromeos/devicetype_utils.h
+++ b/ash/system/devicetype_utils.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef ASH_COMMON_SYSTEM_CHROMEOS_DEVICETYPE_UTILS_H_
-#define ASH_COMMON_SYSTEM_CHROMEOS_DEVICETYPE_UTILS_H_
+#ifndef ASH_SYSTEM_DEVICETYPE_UTILS_H_
+#define ASH_SYSTEM_DEVICETYPE_UTILS_H_
 
 #include "ash/ash_export.h"
 #include "base/strings/string16.h"
@@ -23,4 +23,4 @@ ASH_EXPORT int GetChromeOSDeviceTypeResourceId();
 
 }  // namespace ash
 
-#endif  // ASH_COMMON_SYSTEM_CHROMEOS_DEVICETYPE_UTILS_H_
+#endif  // ASH_SYSTEM_DEVICETYPE_UTILS_H_