Add missing using statements for JNI types.

chrome/browser/android/compositor/scene_layer/scene_layer.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 "chrome/browser/android/compositor/scene_layer/scene_layer.h"
 
 #include "cc/layers/layer.h"
 #include "content/public/browser/android/compositor.h"
 #include "jni/SceneLayer_jni.h"
 
+using base::android::JavaParamRef;
+using base::android::ScopedJavaLocalRef;
+
 namespace chrome {
 namespace android {
 
 // static
 SceneLayer* SceneLayer::FromJavaObject(JNIEnv* env, jobject jobj) {
   if (jobj == nullptr)
     return nullptr;
   return reinterpret_cast<SceneLayer*>(Java_SceneLayer_getNativePtr(env, jobj));
 }
 
@@ skipping 39 matching lines @@
   SceneLayer* tree_provider = new SceneLayer(env, jobj);
   return reinterpret_cast<intptr_t>(tree_provider);
 }
 
 bool RegisterSceneLayer(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 }  // namespace chrome