Remove remote tree host and some related input and metro_driver code

win8/metro_driver/file_picker.h

Index: win8/metro_driver/file_picker.h
diff --git a/win8/metro_driver/file_picker.h b/win8/metro_driver/file_picker.h
deleted file mode 100644
index ef56cb390828860d46184659c7eb78b52920b804..0000000000000000000000000000000000000000
--- a/win8/metro_driver/file_picker.h
+++ /dev/null
@@ -1,18 +0,0 @@
-// 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.
-#ifndef CHROME_BROWSER_UI_METRO_DRIVER_FILE_PICKER_H_
-#define CHROME_BROWSER_UI_METRO_DRIVER_FILE_PICKER_H_
-
-#include <commdlg.h>
-
-// This function behaves similarly to GetOpenFileName, except it uses a
-// Metro file picker to pick a single or multiple file names.
-extern "C" __declspec(dllexport)
-BOOL MetroGetOpenFileName(OPENFILENAME* open_file_name);
-
-extern "C" __declspec(dllexport)
-BOOL MetroGetSaveFileName(OPENFILENAME* open_file_name);
-
-#endif  // CHROME_BROWSER_UI_METRO_DRIVER_FILE_PICKER_H_
-