Pass method parameters as JavaParamRef in chrome/browser (part 2).

chrome/browser/interests/android/interests_service.h

 // 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.
 
 #ifndef CHROME_BROWSER_INTERESTS_ANDROID_INTERESTS_SERVICE_H_
 #define CHROME_BROWSER_INTERESTS_ANDROID_INTERESTS_SERVICE_H_
 
 #include <jni.h>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/interests/interests_fetcher.h"
 
 class Profile;
 
 // Provides a list of user interests to Java
 class InterestsService {
  public:
   explicit InterestsService(Profile* profile);
   virtual ~InterestsService();
 
-  void Destroy(JNIEnv* env, jobject obj);
+  void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
   static bool Register(JNIEnv* env);
   void GetInterests(JNIEnv* env,
-                    jobject obj,
-                    jobject j_callback);
+                    const base::android::JavaParamRef<jobject>& obj,
+                    const base::android::JavaParamRef<jobject>& j_callback);
 
  private:
   void OnObtainedInterests(
       scoped_ptr<InterestsFetcher> fetcher,
       const base::android::ScopedJavaGlobalRef<jobject>& j_callback,
       scoped_ptr<std::vector<InterestsFetcher::Interest>> interests);
 
   Profile* profile_;
 
   base::WeakPtrFactory<InterestsService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InterestsService);
 };
 
 #endif  // CHROME_BROWSER_INTERESTS_ANDROID_INTERESTS_SERVICE_H_