Add missing using statements for JNI types.

chrome/browser/android/intent_helper.cc

 // Copyright (c) 2012 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/intent_helper.h"
 
 #include <jni.h>
 
 #include "base/android/context_utils.h"
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
 #include "jni/IntentHelper_jni.h"
 
 using base::android::AttachCurrentThread;
 using base::android::ConvertUTF16ToJavaString;
+using base::android::ScopedJavaLocalRef;
 
 namespace chrome {
 namespace android {
 
 void SendEmail(const base::string16& d_email,
                const base::string16& d_subject,
                const base::string16& d_body,
                const base::string16& d_chooser_title,
                const base::string16& d_file_to_attach) {
   JNIEnv* env = AttachCurrentThread();
@@ skipping 15 matching lines @@
 }
 
 void OpenDateAndTimeSettings() {
   JNIEnv* env = AttachCurrentThread();
   Java_IntentHelper_openDateAndTimeSettings(env,
       base::android::GetApplicationContext());
 }
 
 }  // namespace android
 }  // namespace chrome