jni_generator: Pass object parameters as JavaParamRef.

content/browser/android/interstitial_page_delegate_android.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/android/interstitial_page_delegate_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
 #include "content/public/browser/interstitial_page.h"
@@ skipping 66 matching lines @@
         base::android::ConvertUTF8ToJavaString(env, sanitized_command).obj());
   }
 }
 
 // static
 bool InterstitialPageDelegateAndroid
     ::RegisterInterstitialPageDelegateAndroid(JNIEnv* env) {
   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));
   return reinterpret_cast<intptr_t>(delegate);
 }
 
 }  // namespace content