jni_generator: Pass object parameters as JavaParamRef.

chrome/browser/android/omnibox/omnibox_prerender.cc

 // Copyright 2013 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 "chrome/browser/android/omnibox/omnibox_prerender.h"
 
 #include "base/android/jni_string.h"
 #include "base/logging.h"
 #include "chrome/browser/android/tab_android.h"
 #include "chrome/browser/predictors/autocomplete_action_predictor.h"
@@ skipping 10 matching lines @@
 using predictors::AutocompleteActionPredictor;
 using predictors::AutocompleteActionPredictorFactory;
 
 OmniboxPrerender::OmniboxPrerender(JNIEnv* env, jobject obj)
     : weak_java_omnibox_(env, obj) {
 }
 
 OmniboxPrerender::~OmniboxPrerender() {
 }
 
-static jlong Init(JNIEnv* env, jobject obj) {
+static jlong Init(JNIEnv* env, const JavaParamRef<jobject>& obj) {
   OmniboxPrerender* omnibox = new OmniboxPrerender(env, obj);
   return reinterpret_cast<intptr_t>(omnibox);
 }
 
 bool RegisterOmniboxPrerender(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 void OmniboxPrerender::Clear(JNIEnv* env,
                              jobject obj,
@@ skipping 108 matching lines @@
         web_contents->GetController().GetDefaultSessionStorageNamespace(),
         container_bounds.size());
     return;
   }
   predictors::AutocompleteActionPredictorFactory::GetForProfile(profile)->
       StartPrerendering(
           match.destination_url,
           web_contents->GetController().GetDefaultSessionStorageNamespace(),
           container_bounds.size());
 }