Move DownloadControllerAndroid from content/ to chrome/

content/public/browser/android/download_controller_android.cc

Index: content/public/browser/android/download_controller_android.cc
diff --git a/content/public/browser/android/download_controller_android.cc b/content/public/browser/android/download_controller_android.cc
deleted file mode 100644
index fc5f82e0172d2d77fceea54ad8e0483c2c19db46..0000000000000000000000000000000000000000
--- a/content/public/browser/android/download_controller_android.cc
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright (c) 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 "content/public/browser/android/download_controller_android.h"
-
-namespace content {
-
-// static
-DownloadControllerAndroid* DownloadControllerAndroid::download_controller_ =
-    nullptr;
-
-}  // namespace content