jni_generator: Pass object parameters as JavaParamRef.

chrome/browser/android/java_exception_reporter.cc

 // Copyright 2015 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 "chrome/browser/android/java_exception_reporter.h"
 
 #include "base/android/build_info.h"
 #include "base/android/jni_android.h"
 #include "base/debug/dump_without_crashing.h"
 #include "jni/JavaExceptionReporter_jni.h"
 
 namespace chrome {
 namespace android {
 
 void InitJavaExceptionReporter() {
   JNIEnv* env = base::android::AttachCurrentThread();
   Java_JavaExceptionReporter_installHandler(env);
 }
 
-void ReportJavaException(JNIEnv* env, jclass jcaller, jthrowable e) {
+void ReportJavaException(JNIEnv* env,
+                         const JavaParamRef<jclass>& jcaller,
+                         const JavaParamRef<jthrowable>& e) {
   // Set the exception_string in BuildInfo so that breakpad can read it.
   base::android::BuildInfo::GetInstance()->SetJavaExceptionInfo(
       base::android::GetJavaExceptionInfo(env, e));
   base::debug::DumpWithoutCrashing();
   base::android::BuildInfo::GetInstance()->ClearJavaExceptionInfo();
 }
 
 bool RegisterJavaExceptionReporterJni(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 
 }  // namespace android
 }  // namespace chrome