jni: Pass method parameters as JavaParamRef in base.

base/android/java_handler_thread.h

 // Copyright 2013 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.
 
 #ifndef BASE_ANDROID_JAVA_HANDLER_THREAD_H_
 #define BASE_ANDROID_JAVA_HANDLER_THREAD_H_
 
 #include <jni.h>
 
 #include "base/android/scoped_java_ref.h"
@@ skipping 15 matching lines @@
  public:
   JavaHandlerThread(const char* name);
   virtual ~JavaHandlerThread();
 
   base::MessageLoop* message_loop() const { return message_loop_.get(); }
   void Start();
   void Stop();
 
   // Called from java on the newly created thread.
   // Start() will not return before this methods has finished.
-  void InitializeThread(JNIEnv* env, jobject obj, jlong event);
-  void StopThread(JNIEnv* env, jobject obj, jlong event);
+  void InitializeThread(JNIEnv* env,
+                        const JavaParamRef<jobject>& obj,
+                        jlong event);
+  void StopThread(JNIEnv* env,
+                  const JavaParamRef<jobject>& obj,
+                  jlong event);
 
   static bool RegisterBindings(JNIEnv* env);
 
  private:
   scoped_ptr<base::MessageLoop> message_loop_;
   ScopedJavaGlobalRef<jobject> java_thread_;
 };
 
 }  // namespace android
 }  // namespace base
 
 #endif  // BASE_ANDROID_JAVA_HANDLER_THREAD_H_