[Android] Prompt with infobar on filename conflict

chrome/browser/android/download/chrome_download_delegate.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_ANDROID_DOWNLOAD_CHROME_DOWNLOAD_DELEGATE_H_
 #define CHROME_BROWSER_ANDROID_DOWNLOAD_CHROME_DOWNLOAD_DELEGATE_H_
 
 #include "base/android/jni_android.h"
+#include "base/android/jni_weak_ref.h"
+#include "base/android/scoped_java_ref.h"
 
-bool RegisterChromeDownloadDeleagte(JNIEnv* env);
+class ChromeDownloadDelegate {
+ public:
+  static void EnqueueDownloadManagerRequest(jobject chrome_download_delegate,
+                                            bool overwrite,
+                                            jobject download_info);
+};
+
+bool RegisterChromeDownloadDelegate(JNIEnv* env);
 
 #endif  // CHROME_BROWSER_ANDROID_DOWNLOAD_CHROME_DOWNLOAD_DELEGATE_H_