Add a method that determines the type of ChromeOS device we are running on.

Currently, this is used for specifying the device type in localization messages. For more context regarding this, see:
- https://codereview.chromium.org/1206063002

This CL replaces an existing utility method of a similar nature with a more robust implementation. The old utility method is removed in the following CL:
- https://codereview.chromium.org/1164393003

This method is used for the following two CL's. Note that it may make sense to define a common GetDeviceNameAsASCII or some style of method, since both of the callers implement one.
- https://codereview.chromium.org/1203263003
- https://codereview.chromium.org/1204093003

BUG=341356

Review URL: https://codereview.chromium.org/1204783005

Cr-Commit-Position: refs/heads/master@{#336300}

3 files changed, 64 insertions, 0 deletions

diff --git a/chromeos/chromeos.gyp b/chromeos/chromeos.gyp
index d11f212..7179621 100644
--- a/chromeos/chromeos.gyp
+++ b/chromeos/chromeos.gyp
@@ -445,6 +445,8 @@
       'settings/timezone_settings.h',
       'settings/timezone_settings_helper.cc',
       'settings/timezone_settings_helper.h',
+      'system/devicetype.cc',
+      'system/devicetype.h',
       'system/name_value_pairs_parser.cc',
       'system/name_value_pairs_parser.h',
       'system/statistics_provider.cc',
diff --git a/chromeos/system/devicetype.cc b/chromeos/system/devicetype.cc
new file mode 100644
index 0000000..c99ddf4
--- /dev/null
+++ b/chromeos/system/devicetype.cc
@@ -0,0 +1,37 @@
+// Copyright 2015 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/system/devicetype.h"
+
+#include <string>
+
+#include "base/sys_info.h"
+
+namespace chromeos {
+
+namespace {
+const char kDeviceType[] = "CHROMEOS_DEVICE_TYPE";
+}
+
+DeviceType GetDeviceType() {
+  std::string value;
+  if (base::SysInfo::GetLsbReleaseValue(kDeviceType, &value)) {
+    if (value == "CHROMEBASE")
+      return DeviceType::kChromebase;
+    else if (value == "CHROMEBIT")
+      return DeviceType::kChromebit;
+    // Most devices are Chromebooks, so we will also consider reference boards
+    // as chromebooks.
+    else if (value == "CHROMEBOOK" || value == "REFERENCE")
+      return DeviceType::kChromebook;
+    else if (value == "CHROMEBOX")
+      return DeviceType::kChromebox;
+    else
+      LOG(ERROR) << "Unknown device type \"" << value << "\"";
+  }
+
+  return DeviceType::kUnknown;
+}
+
+}  // namespace chromeos
diff --git a/chromeos/system/devicetype.h b/chromeos/system/devicetype.h
new file mode 100644
index 0000000..f0a610c
--- /dev/null
+++ b/chromeos/system/devicetype.h
@@ -0,0 +1,25 @@
+// Copyright 2015 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_DEVICETYPE_H_
+#define CHROMEOS_SYSTEM_DEVICETYPE_H_
+
+#include "chromeos/chromeos_export.h"
+
+namespace chromeos {
+
+enum class DeviceType {
+  kChromebase,
+  kChromebit,
+  kChromebook,
+  kChromebox,
+  kUnknown,  // Unknown fallback device.
+};
+
+// Returns the current device type, eg, Chromebook, Chromebox.
+CHROMEOS_EXPORT DeviceType GetDeviceType();
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_SYSTEM_DEVICETYPE_H_