Remove OS_CHROMEOS from ui/ash code

chrome/browser/ui/ash/chrome_new_window_delegate_chromeos.h

Index: chrome/browser/ui/ash/chrome_new_window_delegate_chromeos.h
diff --git a/chrome/browser/ui/ash/chrome_new_window_delegate_chromeos.h b/chrome/browser/ui/ash/chrome_new_window_delegate_chromeos.h
deleted file mode 100644
index c37243d9f96a876239d689a64e637c17479d29ee..0000000000000000000000000000000000000000
--- a/chrome/browser/ui/ash/chrome_new_window_delegate_chromeos.h
+++ /dev/null
@@ -1,26 +0,0 @@
-// Copyright 2013 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_ASH_CHROME_NEW_WINDOW_DELEGATE_CHROMEOS_H_
-#define CHROME_BROWSER_UI_ASH_CHROME_NEW_WINDOW_DELEGATE_CHROMEOS_H_
-
-#include "base/macros.h"
-#include "chrome/browser/ui/ash/chrome_new_window_delegate.h"
-
-class ChromeNewWindowDelegateChromeos : public ChromeNewWindowDelegate {
- public:
-  ChromeNewWindowDelegateChromeos();
-  ~ChromeNewWindowDelegateChromeos() override;
-
-  // Overridden from ash::NewWindowDelegate:
-  void OpenFileManager() override;
-  void OpenCrosh() override;
-  void OpenGetHelp() override;
-  void ShowKeyboardOverlay() override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ChromeNewWindowDelegateChromeos);
-};
-
-#endif  // CHROME_BROWSER_UI_ASH_CHROME_NEW_WINDOW_DELEGATE_CHROMEOS_H_