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

chrome/browser/ui/cocoa/browser_window_factory_cocoa.mm

Index: chrome/browser/ui/cocoa/browser_window_factory_cocoa.mm
diff --git a/chrome/browser/ui/cocoa/browser_window_factory_cocoa.mm b/chrome/browser/ui/cocoa/browser_window_factory_cocoa.mm
index 808cc182446a32f5c1ae469919ea4b878c83cfb7..5ba519914152d10641f8a7e67692992d063c7f0b 100644
--- a/chrome/browser/ui/cocoa/browser_window_factory_cocoa.mm
+++ b/chrome/browser/ui/cocoa/browser_window_factory_cocoa.mm
@@ -14,9 +14,3 @@ BrowserWindow* BrowserWindow::CreateBrowserWindow(Browser* browser) {
       [[BrowserWindowController alloc] initWithBrowser:browser];
   return [controller browserWindow];
 }
-
-// static
-chrome::HostDesktopType BrowserWindow::AdjustHostDesktopType(
-    chrome::HostDesktopType desktop_type) {
-  return desktop_type;
-}