Add missing using statements for JNI types.

chrome/browser/android/offline_pages/background_scheduler_bridge.cc

 // Copyright 2016 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 "base/android/callback_android.h"
 #include "base/android/scoped_java_ref.h"
 #include "chrome/browser/android/offline_pages/background_scheduler_bridge.h"
 #include "chrome/browser/android/offline_pages/offline_page_model_factory.h"
 #include "chrome/browser/android/offline_pages/request_coordinator_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "components/offline_pages/background/device_conditions.h"
 #include "components/offline_pages/background/request_coordinator.h"
 #include "jni/BackgroundSchedulerBridge_jni.h"
 
+using base::android::JavaParamRef;
 using base::android::ScopedJavaGlobalRef;
+using base::android::ScopedJavaLocalRef;
 
 namespace offline_pages {
 namespace android {
 
 namespace {
 
 // C++ callback that delegates to Java callback.
 void ProcessingDoneCallback(
     const ScopedJavaGlobalRef<jobject>& j_callback_obj, bool result) {
   base::android::RunCallbackAndroid(j_callback_obj, result);
@@ skipping 50 matching lines @@
       env, require_power_connected, minimum_battery_percentage,
       require_unmetered_network);
 }
 
 bool RegisterBackgroundSchedulerBridge(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 }  // namespace offline_pages