jni_generator: Pass object parameters as JavaParamRef.

content/browser/android/interstitial_page_delegate_android.cc

Index: content/browser/android/interstitial_page_delegate_android.cc
diff --git a/content/browser/android/interstitial_page_delegate_android.cc b/content/browser/android/interstitial_page_delegate_android.cc
index f598cd36a5c6dfee342ddbad2632f2394343366f..ce727ef830ed88bf199eb43dfd8aef79980e4636 100644
--- a/content/browser/android/interstitial_page_delegate_android.cc
+++ b/content/browser/android/interstitial_page_delegate_android.cc
@@ -84,7 +84,9 @@ bool InterstitialPageDelegateAndroid
   return RegisterNativesImpl(env);
 }
 
-static jlong Init(JNIEnv* env, jobject obj, jstring html_content) {
+static jlong Init(JNIEnv* env,
+                  const JavaParamRef<jobject>& obj,
+                  const JavaParamRef<jstring>& html_content) {
   InterstitialPageDelegateAndroid* delegate =
       new InterstitialPageDelegateAndroid(
           env, obj, base::android::ConvertJavaStringToUTF8(env, html_content));