jni_generator: Pass object parameters as JavaParamRef.

base/android/memory_pressure_listener_android.cc

Index: base/android/memory_pressure_listener_android.cc
diff --git a/base/android/memory_pressure_listener_android.cc b/base/android/memory_pressure_listener_android.cc
index 80c07bcf9c1ae305b9a5f331603934b3efee0e53..9d3dd463df03a4c012d2ce63d9cec4d404ed646c 100644
--- a/base/android/memory_pressure_listener_android.cc
+++ b/base/android/memory_pressure_listener_android.cc
@@ -8,8 +8,9 @@
 #include "jni/MemoryPressureListener_jni.h"
 
 // Defined and called by JNI.
-static void OnMemoryPressure(
-    JNIEnv* env, jclass clazz, jint memory_pressure_level) {
+static void OnMemoryPressure(JNIEnv* env,
+                             const JavaParamRef<jclass>& clazz,
+                             jint memory_pressure_level) {
   base::MemoryPressureListener::NotifyMemoryPressure(
       static_cast<base::MemoryPressureListener::MemoryPressureLevel>(
           memory_pressure_level));