jni_generator: Pass object parameters as JavaParamRef.

android_webview/native/aw_form_database.cc

Index: android_webview/native/aw_form_database.cc
diff --git a/android_webview/native/aw_form_database.cc b/android_webview/native/aw_form_database.cc
index 2269d76ecbbbf1532075a8eccadba13e7b7a3a01..8e31e886707a73c538273ed754e9f4684ce2408d 100644
--- a/android_webview/native/aw_form_database.cc
+++ b/android_webview/native/aw_form_database.cc
@@ -26,12 +26,12 @@ AwFormDatabaseService* GetFormDatabaseService() {
 } // anonymous namespace
 
 // static
-jboolean HasFormData(JNIEnv*, jclass) {
+jboolean HasFormData(JNIEnv*, const JavaParamRef<jclass>&) {
   return GetFormDatabaseService()->HasFormData();
 }
 
 // static
-void ClearFormData(JNIEnv*, jclass) {
+void ClearFormData(JNIEnv*, const JavaParamRef<jclass>&) {
   GetFormDatabaseService()->ClearFormData();
 }