jni_generator: Pass object parameters as JavaParamRef.

android_webview/native/aw_settings.cc

Index: android_webview/native/aw_settings.cc
diff --git a/android_webview/native/aw_settings.cc b/android_webview/native/aw_settings.cc
index a5ae993bc71502b1c1baba606e3a3b09c0f2a18d..f708da6fd057f8fcb784924cfcf33ba7a38ee525 100644
--- a/android_webview/native/aw_settings.cc
+++ b/android_webview/native/aw_settings.cc
@@ -421,16 +421,17 @@ void AwSettings::PopulateWebPreferencesLocked(
 }
 
 static jlong Init(JNIEnv* env,
-                  jobject obj,
-                  jobject web_contents) {
+                  const JavaParamRef<jobject>& obj,
+                  const JavaParamRef<jobject>& web_contents) {
   content::WebContents* contents = content::WebContents::FromJavaWebContents(
       web_contents);
   AwSettings* settings = new AwSettings(env, obj, contents);
   return reinterpret_cast<intptr_t>(settings);
 }
 
-static ScopedJavaLocalRef<jstring> GetDefaultUserAgent(JNIEnv* env,
-                                                       jclass clazz) {
+static ScopedJavaLocalRef<jstring> GetDefaultUserAgent(
+    JNIEnv* env,
+    const JavaParamRef<jclass>& clazz) {
   return base::android::ConvertUTF8ToJavaString(env, GetUserAgent());
 }