implementation for new duplicate download UI

chrome/browser/ui/android/infobars/download_overwrite_infobar.h

-// 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.
-
-#ifndef CHROME_BROWSER_UI_ANDROID_INFOBARS_DOWNLOAD_OVERWRITE_INFOBAR_H_
-#define CHROME_BROWSER_UI_ANDROID_INFOBARS_DOWNLOAD_OVERWRITE_INFOBAR_H_
-
-#include "base/android/scoped_java_ref.h"
-#include "base/macros.h"
-#include "chrome/browser/ui/android/infobars/infobar_android.h"
-
-namespace chrome {
-namespace android {
-class DownloadOverwriteInfoBarDelegate;
-}
-}
-
-// A native-side implementation of an infobar to ask whether to overwrite
-// an existing file with a new download.
-class DownloadOverwriteInfoBar : public InfoBarAndroid {
- public:
-  static std::unique_ptr<infobars::InfoBar> CreateInfoBar(
-      std::unique_ptr<chrome::android::DownloadOverwriteInfoBarDelegate>
-          delegate);
-  ~DownloadOverwriteInfoBar() override;
-
- private:
-  explicit DownloadOverwriteInfoBar(
-      std::unique_ptr<chrome::android::DownloadOverwriteInfoBarDelegate>
-          delegate);
-
-  // InfoBarAndroid:
-  base::android::ScopedJavaLocalRef<jobject> CreateRenderInfoBar(
-      JNIEnv* env) override;
-  void ProcessButton(int action) override;
-
-  chrome::android::DownloadOverwriteInfoBarDelegate* GetDelegate();
-
-  DISALLOW_COPY_AND_ASSIGN(DownloadOverwriteInfoBar);
-};
-
-#endif  // CHROME_BROWSER_UI_ANDROID_INFOBARS_DOWNLOAD_OVERWRITE_INFOBAR_H_