jni_generator: Pass object parameters as JavaParamRef.

components/cronet/android/cronet_url_request_context_adapter.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 "components/cronet/android/cronet_url_request_context_adapter.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/bind.h"
 #include "base/files/file_util.h"
@@ skipping 380 matching lines @@
   if (!file_thread_) {
     file_thread_.reset(new base::Thread("Network File Thread"));
     file_thread_->Start();
   }
   return file_thread_.get();
 }
 
 // Creates RequestContextAdater if config is valid URLRequestContextConfig,
 // returns 0 otherwise.
 static jlong CreateRequestContextAdapter(JNIEnv* env,
-                                         jclass jcaller,
-                                         jstring jconfig) {
+                                         const JavaParamRef<jclass>& jcaller,
+                                         const JavaParamRef<jstring>& jconfig) {
   std::string config_string =
       base::android::ConvertJavaStringToUTF8(env, jconfig);
   scoped_ptr<URLRequestContextConfig> context_config(
       new URLRequestContextConfig());
   if (!context_config->LoadFromJSON(config_string))
     return 0;
 
   CronetURLRequestContextAdapter* context_adapter =
       new CronetURLRequestContextAdapter(context_config.Pass());
   return reinterpret_cast<jlong>(context_adapter);
 }
 
-static jint SetMinLogLevel(JNIEnv* env, jclass jcaller, jint jlog_level) {
+static jint SetMinLogLevel(JNIEnv* env,
+                           const JavaParamRef<jclass>& jcaller,
+                           jint jlog_level) {
   jint old_log_level = static_cast<jint>(logging::GetMinLogLevel());
   // MinLogLevel is global, shared by all URLRequestContexts.
   logging::SetMinLogLevel(static_cast<int>(jlog_level));
   return old_log_level;
 }
 
 }  // namespace cronet