Remove base/win/metro.{cc|h} and some associated code

chrome/browser/ui/views/frame/native_browser_frame_factory.cc

 // 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.
 
 #include "chrome/browser/ui/views/frame/native_browser_frame_factory.h"
 
 #include "build/build_config.h"
 #include "chrome/browser/ui/views/frame/native_browser_frame.h"
 
 namespace {
 
 NativeBrowserFrameFactory* factory = nullptr;
 
 }
 
 // static
 NativeBrowserFrame* NativeBrowserFrameFactory::CreateNativeBrowserFrame(
     BrowserFrame* browser_frame,
     BrowserView* browser_view) {
   if (!factory)
     factory = new NativeBrowserFrameFactory;
   return factory->Create(browser_frame, browser_view);
 }
 
 // static
 void NativeBrowserFrameFactory::Set(NativeBrowserFrameFactory* new_factory) {
   delete factory;
   factory = new_factory;
 }
-
-#if !defined(OS_WIN)
-// static
-chrome::HostDesktopType NativeBrowserFrameFactory::AdjustHostDesktopType(
-    chrome::HostDesktopType desktop_type) {
-  return desktop_type;
-}
-#endif  // !defined(OS_WIN)
-
-#if !defined(USE_ASH) || defined(OS_CHROMEOS)
-// static
-bool NativeBrowserFrameFactory::ShouldCreateForAshDesktop(
-    BrowserView* browser_view) {
-  NOTREACHED();
-  return false;
-}
-#endif  // !defined(OS_WIN) || !defined(USE_ASH)