Add missing using statements for JNI types.

chrome/browser/ui/android/infobars/download_overwrite_infobar.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/ui/android/infobars/download_overwrite_infobar.h"
 
 #include <utility>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/android/jni_weak_ref.h"
 #include "base/files/file_path.h"
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/android/download/download_overwrite_infobar_delegate.h"
 #include "jni/DownloadOverwriteInfoBar_jni.h"
 
+using base::android::ScopedJavaLocalRef;
 using chrome::android::DownloadOverwriteInfoBarDelegate;
 
 // static
 std::unique_ptr<infobars::InfoBar> DownloadOverwriteInfoBar::CreateInfoBar(
     std::unique_ptr<DownloadOverwriteInfoBarDelegate> delegate) {
   return base::WrapUnique(new DownloadOverwriteInfoBar(std::move(delegate)));
 }
 
 DownloadOverwriteInfoBar::~DownloadOverwriteInfoBar() {
 }
@@ skipping 30 matching lines @@
     if (delegate->CreateNewFile())
       RemoveSelf();
   } else {
     CHECK(false);
   }
 }
 
 DownloadOverwriteInfoBarDelegate* DownloadOverwriteInfoBar::GetDelegate() {
   return static_cast<DownloadOverwriteInfoBarDelegate*>(delegate());
 }