jni_generator: Pass object parameters as JavaParamRef.

net/cert/x509_util_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 "net/cert/x509_util_android.h"
 
 #include "base/android/build_info.h"
 #include "base/android/jni_android.h"
 #include "base/metrics/histogram_macros.h"
 #include "jni/X509Util_jni.h"
 #include "net/cert/cert_database.h"
 
 namespace net {
 
-void NotifyKeyChainChanged(JNIEnv* env, jclass clazz) {
+void NotifyKeyChainChanged(JNIEnv* env, const JavaParamRef<jclass>& clazz) {
   CertDatabase::GetInstance()->OnAndroidKeyChainChanged();
 }
 
 void RecordCertVerifyCapabilitiesHistogram(JNIEnv* env,
-                                           jclass clazz,
+                                           const JavaParamRef<jclass>& clazz,
                                            jboolean found_system_trust_roots) {
   // Only record the histogram for 4.2 and up. Before 4.2, the platform doesn't
   // return the certificate chain anyway.
   if (base::android::BuildInfo::GetInstance()->sdk_int() >= 17) {
     UMA_HISTOGRAM_BOOLEAN("Net.FoundSystemTrustRootsAndroid",
                           found_system_trust_roots);
   }
 }
 
-ScopedJavaLocalRef<jobject> GetApplicationContext(JNIEnv* env, jclass clazz) {
+ScopedJavaLocalRef<jobject> GetApplicationContext(
+    JNIEnv* env,
+    const JavaParamRef<jclass>& clazz) {
   ScopedJavaLocalRef<jobject> r;
   // Must use Reset to force creation of a new local ref, instead of trying to
   // adopt the global-ref'ed jobject as a local ref as the constructor would.
   r.Reset(env, base::android::GetApplicationContext());
   return r;
 }
 
 bool RegisterX509Util(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // net namespace