Cleanup of system settings constants (ab)use.

chrome/browser/chromeos/extensions/info_private_api.cc

Index: chrome/browser/chromeos/extensions/info_private_api.cc
diff --git a/chrome/browser/chromeos/extensions/info_private_api.cc b/chrome/browser/chromeos/extensions/info_private_api.cc
index 872d7902814dac34dfa228401ecd752ada86c1d2..8bd78aa87b5242988cc11df12df3fbec164451e9 100644
--- a/chrome/browser/chromeos/extensions/info_private_api.cc
+++ b/chrome/browser/chromeos/extensions/info_private_api.cc
@@ -18,9 +18,6 @@ namespace extensions {
 
 namespace {
 
-// Name of machine statistic property with HWID.
-const char kHardwareClass[] = "hardware_class";
-
 // Key which corresponds to the HWID setting.
 const char kPropertyHWID[] = "hwid";
 
@@ -30,9 +27,6 @@ const char kPropertyHomeProvider[] = "homeProvider";
 // Key which corresponds to the initial_locale property.
 const char kPropertyInitialLocale[] = "initialLocale";
 
-// Name of machine statistic property with board.
-const char kPropertyReleaseBoard[] = "CHROMEOS_RELEASE_BOARD";
-
 // Key which corresponds to the board property in JS.
 const char kPropertyBoard[] = "board";
 
@@ -69,7 +63,7 @@ base::Value* ChromeosInfoPrivateGetFunction::GetValue(
     std::string hwid;
     chromeos::system::StatisticsProvider* provider =
         chromeos::system::StatisticsProvider::GetInstance();
-    provider->GetMachineStatistic(kHardwareClass, &hwid);
+    provider->GetMachineStatistic(chromeos::system::kHardwareClass, &hwid);
     return new base::StringValue(hwid);
   } else if (property_name == kPropertyHomeProvider) {
     NetworkLibrary* netlib = CrosLibrary::Get()->GetNetworkLibrary();
@@ -81,7 +75,7 @@ base::Value* ChromeosInfoPrivateGetFunction::GetValue(
     std::string board;
     chromeos::system::StatisticsProvider* provider =
         chromeos::system::StatisticsProvider::GetInstance();
-    provider->GetMachineStatistic(kPropertyReleaseBoard, &board);
+    provider->GetMachineStatistic(chromeos::system::kMachineInfoBoard, &board);
     return new base::StringValue(board);
   } else if (property_name == kPropertyOwner) {
     return Value::CreateBooleanValue(