Add missing using statements for JNI types.

components/external_video_surface/browser/android/external_video_surface_container_impl.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/external_video_surface/browser/android/external_video_surface_container_impl.h"
 
 #include "base/android/jni_android.h"
 #include "content/public/browser/android/content_view_core.h"
 #include "jni/ExternalVideoSurfaceContainer_jni.h"
 #include "ui/gfx/geometry/rect_f.h"
 
 using base::android::AttachCurrentThread;
+using base::android::JavaParamRef;
 using content::ContentViewCore;
 
 namespace external_video_surface {
 
 // static
 bool ExternalVideoSurfaceContainerImpl::RegisterJni(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 // static
@@ skipping 86 matching lines @@
 
 void ExternalVideoSurfaceContainerImpl::SurfaceDestroyed(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj,
     jint player_id) {
   if (!surface_destroyed_cb_.is_null())
     surface_destroyed_cb_.Run(static_cast<int>(player_id));
 }
 
 }  // namespace external_video_surface