jni_generator: Pass object parameters as JavaParamRef.

components/cronet/android/test/network_change_notifier_util.cc

 // Copyright 2014 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 "network_change_notifier_util.h"
 
 #include "base/android/jni_android.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ skipping 27 matching lines @@
   bool ip_address_changed_;
 
   DISALLOW_COPY_AND_ASSIGN(TestIPAddressObserver);
 };
 
 }  // namespace
 
 // Adds a TestIPAddressObserver to the list of IPAddressObservers, and returns
 // a boolean indicating whether the TestIPAddressObserver has received
 // notification when network changes.
-static jboolean IsTestIPAddressObserverCalled(JNIEnv* jenv, jclass jcaller) {
+static jboolean IsTestIPAddressObserverCalled(
+    JNIEnv* jenv,
+    const JavaParamRef<jclass>& jcaller) {
   // This method is called on a Java thread with no MessageLoop, but we need
   // one for the NetworkChangeNotifier to call the observer on.
   base::MessageLoop loop;
   TestIPAddressObserver test_observer;
   net::NetworkChangeNotifier::AddIPAddressObserver(&test_observer);
   net::NetworkChangeNotifier::NotifyObserversOfIPAddressChangeForTests();
 
   base::RunLoop().RunUntilIdle();
   net::NetworkChangeNotifier::RemoveIPAddressObserver(&test_observer);
 
   return test_observer.ip_address_changed();
 }
 
 bool RegisterNetworkChangeNotifierUtil(JNIEnv* jenv) {
   return RegisterNativesImpl(jenv);
 }
 
 }  // namespace cronet