jni_generator: Make all object-returning natives return ScopedJavaLocalRef.

chrome/browser/dom_distiller/dom_distiller_service_factory_android.h

 // 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.
 
 #ifndef CHROME_BROWSER_DOM_DISTILLER_DOM_DISTILLER_SERVICE_FACTORY_ANDROID_H_
 #define CHROME_BROWSER_DOM_DISTILLER_DOM_DISTILLER_SERVICE_FACTORY_ANDROID_H_
 
 #include <jni.h>
+#include "base/android/scoped_java_ref.h"
 
 namespace dom_distiller {
 namespace android {
 
 // This class should not be used except from the Java class
 // DomDistillerServiceFactory.
 class DomDistillerServiceFactoryAndroid {
  public:
-  static jobject GetForProfile(JNIEnv* env, jclass clazz, jobject j_profile);
+  static base::android::ScopedJavaLocalRef<jobject>
+  GetForProfile(JNIEnv* env, jclass clazz, jobject j_profile);
+
   static bool Register(JNIEnv* env);
 };
 
 }  // namespace android
 }  // namespace dom_distiller
 
 #endif  // CHROME_BROWSER_DOM_DISTILLER_DOM_DISTILLER_SERVICE_FACTORY_ANDROID_H_