Add missing using statements for JNI types.

android_webview/native/aw_gl_functor.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 "android_webview/native/aw_gl_functor.h"
 
 #include "android_webview/public/browser/draw_gl.h"
 #include "content/public/browser/browser_thread.h"
 #include "jni/AwGLFunctor_jni.h"
 
 using base::android::AttachCurrentThread;
+using base::android::JavaParamRef;
+using base::android::ScopedJavaLocalRef;
 using content::BrowserThread;
 
 extern "C" {
 static AwDrawGLFunction DrawGLFunction;
 static void DrawGLFunction(long view_context,
                            AwDrawGLInfo* draw_info,
                            void* spare) {
   // |view_context| is the value that was returned from the java
   // AwContents.onPrepareDrawGL; this cast must match the code there.
   reinterpret_cast<android_webview::RenderThreadManager*>(view_context)
@@ skipping 74 matching lines @@
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   return reinterpret_cast<intptr_t>(
       new AwGLFunctor(JavaObjectWeakGlobalRef(env, obj)));
 }
 
 bool RegisterAwGLFunctor(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android_webview