jni_generator: Pass object parameters as JavaParamRef.

base/power_monitor/power_monitor_device_source_android.cc

Index: base/power_monitor/power_monitor_device_source_android.cc
diff --git a/base/power_monitor/power_monitor_device_source_android.cc b/base/power_monitor/power_monitor_device_source_android.cc
index 4d9eb5278001ff7130b497275f0b8d663c4c96cf..9671c30761ebb31584f1165e627f21933fc37baa 100644
--- a/base/power_monitor/power_monitor_device_source_android.cc
+++ b/base/power_monitor/power_monitor_device_source_android.cc
@@ -19,15 +19,15 @@ void ProcessPowerEventHelper(PowerMonitorSource::PowerEvent event) {
 namespace android {
 
 // Native implementation of PowerMonitor.java.
-void OnBatteryChargingChanged(JNIEnv* env, jclass clazz) {
+void OnBatteryChargingChanged(JNIEnv* env, const JavaParamRef<jclass>& clazz) {
   ProcessPowerEventHelper(PowerMonitorSource::POWER_STATE_EVENT);
 }
 
-void OnMainActivityResumed(JNIEnv* env, jclass clazz) {
+void OnMainActivityResumed(JNIEnv* env, const JavaParamRef<jclass>& clazz) {
   ProcessPowerEventHelper(PowerMonitorSource::RESUME_EVENT);
 }
 
-void OnMainActivitySuspended(JNIEnv* env, jclass clazz) {
+void OnMainActivitySuspended(JNIEnv* env, const JavaParamRef<jclass>& clazz) {
   ProcessPowerEventHelper(PowerMonitorSource::SUSPEND_EVENT);
 }