Expose cellular signal strength on Android to native

net/android/net_jni_registrar.cc

Index: net/android/net_jni_registrar.cc
diff --git a/net/android/net_jni_registrar.cc b/net/android/net_jni_registrar.cc
index ba1b5a8d789ef1c8c8d2e22602a384e87c04362f..cdf1559567e9b5e46eb94a40bfd270e18ac87505 100644
--- a/net/android/net_jni_registrar.cc
+++ b/net/android/net_jni_registrar.cc
@@ -6,6 +6,7 @@
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_registrar.h"
+#include "net/android/cellular_signal_strength.h"
 #include "net/android/gurl_utils.h"
 #include "net/android/http_auth_negotiate_android.h"
 #include "net/android/keystore.h"
@@ -26,6 +27,7 @@ static base::android::RegistrationMethod kNetRegisteredMethods[] = {
     {"AndroidCertVerifyResult", RegisterCertVerifyResult},
     {"AndroidKeyStore", RegisterKeyStore},
     {"AndroidNetworkLibrary", RegisterNetworkLibrary},
+    {"AndroidCellularSignalStrength", cellular_signal_strength::Register},
     {"AndroidTrafficStats", traffic_stats::Register},
     {"GURLUtils", RegisterGURLUtils},
     {"HttpAuthNegotiateAndroid", HttpAuthNegotiateAndroid::Register},