jni_generator: Make all object-returning natives return ScopedJavaLocalRef.

net/cert/x509_util_android.cc

Index: net/cert/x509_util_android.cc
diff --git a/net/cert/x509_util_android.cc b/net/cert/x509_util_android.cc
index e3496b2db30ded757c7d798917eeec94e6095468..92a797e9b292de8f393290da665b6a6e61ca9ba8 100644
--- a/net/cert/x509_util_android.cc
+++ b/net/cert/x509_util_android.cc
@@ -27,8 +27,9 @@ void RecordCertVerifyCapabilitiesHistogram(JNIEnv* env,
   }
 }
 
-jobject GetApplicationContext(JNIEnv* env, jclass clazz) {
-  return base::android::GetApplicationContext();
+ScopedJavaLocalRef<jobject> GetApplicationContext(JNIEnv* env, jclass clazz) {
+  return ScopedJavaLocalRef<jobject>(env,
+                                     base::android::GetApplicationContext());
 }
 
 bool RegisterX509Util(JNIEnv* env) {