Add missing using statements for JNI types.

chrome/browser/android/compositor/scene_layer/reader_mode_scene_layer.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 "chrome/browser/android/compositor/scene_layer/reader_mode_scene_layer.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "cc/layers/solid_color_layer.h"
 #include "chrome/browser/android/compositor/layer/reader_mode_layer.h"
 #include "content/public/browser/android/compositor.h"
 #include "content/public/browser/web_contents.h"
 #include "jni/ReaderModeSceneLayer_jni.h"
 #include "ui/android/resources/resource_manager_impl.h"
 #include "ui/android/view_android.h"
 #include "ui/gfx/android/java_bitmap.h"
 
+using base::android::JavaParamRef;
+
 namespace chrome {
 namespace android {
 
 ReaderModeSceneLayer::ReaderModeSceneLayer(JNIEnv* env, jobject jobj)
     : SceneLayer(env, jobj),
       base_page_brightness_(1.0f),
       content_container_(cc::Layer::Create()) {
   // Responsible for moving the base page without modifying the layer itself.
   content_container_->SetIsDrawable(true);
   content_container_->SetPosition(gfx::PointF(0.0f, 0.0f));
@@ skipping 127 matching lines @@
       new ReaderModeSceneLayer(env, jobj);
   return reinterpret_cast<intptr_t>(reader_mode_scene_layer);
 }
 
 bool RegisterReaderModeSceneLayer(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 }  // namespace chrome