Add missing using statements for JNI types.

android_webview/native/aw_form_database.cc

 // Copyright 2013 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_form_database.h"
 
 #include "android_webview/browser/aw_browser_context.h"
 #include "android_webview/browser/aw_content_browser_client.h"
 #include "android_webview/browser/aw_form_database_service.h"
 #include "base/android/jni_android.h"
 #include "base/logging.h"
 #include "base/time/time.h"
 #include "jni/AwFormDatabase_jni.h"
 
+using base::android::JavaParamRef;
+
 namespace android_webview {
 
 namespace {
 
 AwFormDatabaseService* GetFormDatabaseService() {
 
   AwBrowserContext* context = AwContentBrowserClient::GetAwBrowserContext();
   AwFormDatabaseService* service = context->GetFormDatabaseService();
   return service;
 }
 
 } // anonymous namespace
 
 // static
 jboolean HasFormData(JNIEnv*, const JavaParamRef<jclass>&) {
   return GetFormDatabaseService()->HasFormData();
 }
 
 // static
 void ClearFormData(JNIEnv*, const JavaParamRef<jclass>&) {
   GetFormDatabaseService()->ClearFormData();
 }
 
 bool RegisterAwFormDatabase(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 } // namespace android_webview