jni_generator: Pass object parameters as JavaParamRef.

chrome/browser/android/recently_closed_tabs_bridge.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/recently_closed_tabs_bridge.h"
 
 #include "base/android/jni_string.h"
 #include "chrome/browser/android/tab_android.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_android.h"
@@ skipping 139 matching lines @@
   // TabRestoreServiceFactory::GetForProfile() can return NULL (e.g. in
   // incognito mode).
   if (tab_restore_service_) {
     // This does nothing if the tabs have already been loaded or they
     // shouldn't be loaded.
     tab_restore_service_->LoadTabsFromLastSession();
     tab_restore_service_->AddObserver(this);
   }
 }
 
-static jlong Init(JNIEnv* env, jobject obj, jobject jprofile) {
+static jlong Init(JNIEnv* env,
+                  const JavaParamRef<jobject>& obj,
+                  const JavaParamRef<jobject>& jprofile) {
   RecentlyClosedTabsBridge* bridge = new RecentlyClosedTabsBridge(
       ProfileAndroid::FromProfileAndroid(jprofile));
   return reinterpret_cast<intptr_t>(bridge);
 }
 
 // static
 bool RecentlyClosedTabsBridge::Register(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }