Better support for Cellular roaming state in ONC

components/onc/onc_constants.cc

Index: components/onc/onc_constants.cc
diff --git a/components/onc/onc_constants.cc b/components/onc/onc_constants.cc
index 06c69dbc0b9acd8920a2dbeaa4ff40d43be7b999..0c14f23ae7d4969d8fca400677f5e668fdcc4aa8 100644
--- a/components/onc/onc_constants.cc
+++ b/components/onc/onc_constants.cc
@@ -114,10 +114,10 @@ const char kMIN[] = "MIN";
 const char kModelID[] = "ModelID";
 const char kNetworkTechnology[] = "NetworkTechnology";
 const char kPRLVersion[] = "PRLVersion";
-const char kProviderRequiresRoaming[] = "ProviderRequiresRoaming";
+const char kRoamingHome[] = "Home";
+const char kRoamingRequired[] = "Required";
+const char kRoamingRoaming[] = "Roaming";
 const char kRoamingState[] = "RoamingState";
-const char kHome[] = "Home";
-const char kRoaming[] = "Roaming";
 const char kServingOperator[] = "ServingOperator";
 const char kSignalStrength[] = "SignalStrength";
 const char kSIMLockStatus[] = "SIMLockStatus";