jni_generator: Pass object parameters as JavaParamRef.

chrome/browser/android/signin/signin_manager_android.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 <vector>
 
 #include "chrome/browser/android/signin/signin_manager_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
@@ skipping 266 matching lines @@
 jboolean SigninManagerAndroid::IsSignedInOnNative(JNIEnv* env, jobject obj) {
   return SigninManagerFactory::GetForProfile(profile_)->IsAuthenticated();
 }
 
 void SigninManagerAndroid::OnSigninAllowedPrefChanged() {
   Java_SigninManager_onSigninAllowedByPolicyChanged(
       base::android::AttachCurrentThread(), java_signin_manager_.obj(),
       SigninManagerFactory::GetForProfile(profile_)->IsSigninAllowed());
 }
 
-static jlong Init(JNIEnv* env, jobject obj) {
+static jlong Init(JNIEnv* env, const JavaParamRef<jobject>& obj) {
   SigninManagerAndroid* signin_manager_android =
       new SigninManagerAndroid(env, obj);
   return reinterpret_cast<intptr_t>(signin_manager_android);
 }
 
-static jboolean ShouldLoadPolicyForUser(JNIEnv* env,
-                                        jobject obj,
-                                        jstring j_username) {
+static jboolean ShouldLoadPolicyForUser(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& obj,
+    const JavaParamRef<jstring>& j_username) {
 #if defined(ENABLE_CONFIGURATION_POLICY)
   std::string username =
       base::android::ConvertJavaStringToUTF8(env, j_username);
   return !policy::BrowserPolicyConnector::IsNonEnterpriseUser(username);
 #else
   return false;
 #endif
 }
 
 // static
 bool SigninManagerAndroid::Register(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }