Helper functions in NetworkChangeNotifier related to WWAN use

net/base/network_change_notifier.cc

Index: net/base/network_change_notifier.cc
diff --git a/net/base/network_change_notifier.cc b/net/base/network_change_notifier.cc
index 6b87a3a95cd9e18ec9d15743c3fc4206f626fa1d..95367faff3567d74c363ca67d215a477e06be21b 100644
--- a/net/base/network_change_notifier.cc
+++ b/net/base/network_change_notifier.cc
@@ -275,6 +275,30 @@ NetworkChangeNotifier::GetAddressTracker() {
 #endif
 
 // static
+bool NetworkChangeNotifier::IsOffline() {
+   return GetConnectionType() == CONNECTION_NONE;
+}
+
+// static
+bool NetworkChangeNotifier::IsConnectionCellular(ConnectionType type) {
+  bool is_cellular = false;
+  switch (type) {
+    case CONNECTION_2G:
+    case CONNECTION_3G:
+    case CONNECTION_4G:
+      is_cellular =  true;
+      break;
+    case CONNECTION_UNKNOWN:
+    case CONNECTION_ETHERNET:
+    case CONNECTION_WIFI:
+    case CONNECTION_NONE:
+      is_cellular = false;
+      break;
+  }
+  return is_cellular;
+}
+
+// static
 NetworkChangeNotifier* NetworkChangeNotifier::CreateMock() {
   return new MockNetworkChangeNotifier();
 }