Add missing using statements for JNI types.

components/dom_distiller/content/browser/distillable_page_utils_android.cc

 // 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.
 
 #include "components/dom_distiller/content/browser/distillable_page_utils_android.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "components/dom_distiller/content/browser/distillable_page_utils.h"
 #include "content/public/browser/web_contents.h"
 #include "jni/DistillablePageUtils_jni.h"
 
+using base::android::JavaParamRef;
 using base::android::ScopedJavaGlobalRef;
 
 namespace dom_distiller {
 namespace android {
 namespace {
 void OnIsPageDistillableResult(
     std::unique_ptr<ScopedJavaGlobalRef<jobject>> callback_holder,
     bool isDistillable) {
   Java_DistillablePageUtils_callOnIsPageDistillableResult(
       base::android::AttachCurrentThread(), callback_holder->obj(),
@@ skipping 50 matching lines @@
       base::Bind(OnIsPageDistillableUpdate, base::Owned(callback_holder));
   setDelegate(web_contents, delegate);
 }
 
 bool RegisterDistillablePageUtils(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }
 }