Add missing using statements for JNI types.

components/dom_distiller/core/dom_distiller_service_android.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/dom_distiller/core/dom_distiller_service_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
 #include "components/dom_distiller/core/distilled_page_prefs.h"
 #include "components/dom_distiller/core/distilled_page_prefs_android.h"
 #include "components/dom_distiller/core/dom_distiller_service.h"
 #include "jni/DomDistillerService_jni.h"
 
 using base::android::ConvertUTF8ToJavaString;
+using base::android::JavaParamRef;
 using base::android::ScopedJavaLocalRef;
 
 namespace dom_distiller {
 namespace android {
 
 DomDistillerServiceAndroid::DomDistillerServiceAndroid(
     DomDistillerService* service)
     : service_(service) {
   JNIEnv* env = base::android::AttachCurrentThread();
   base::android::ScopedJavaLocalRef<jobject> local_java_ref =
@@ skipping 27 matching lines @@
     const JavaParamRef<jobject>& obj) {
   return reinterpret_cast<intptr_t>(service_->GetDistilledPagePrefs());
 }
 
 bool DomDistillerServiceAndroid::Register(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 }  // namespace dom_distiller