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

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

Index: chrome/browser/ui/views/frame/native_browser_frame_factory_auralinux.cc
diff --git a/chrome/browser/ui/views/frame/native_browser_frame_factory_auralinux.cc b/chrome/browser/ui/views/frame/native_browser_frame_factory_auralinux.cc
index 16e4cd1490bcb31eaf93e2ec9fb678942a947663..f45b2a2e2eb8d8cc880fb2e4edb28794949d11f3 100644
--- a/chrome/browser/ui/views/frame/native_browser_frame_factory_auralinux.cc
+++ b/chrome/browser/ui/views/frame/native_browser_frame_factory_auralinux.cc
@@ -6,10 +6,6 @@
 
 #include "chrome/browser/ui/views/frame/desktop_browser_frame_auralinux.h"
 
-#if defined(USE_ASH)
-#include "chrome/browser/ui/views/frame/browser_frame_ash.h"
-#endif
-
 #if defined(MOJO_SHELL_CLIENT)
 #include "chrome/browser/ui/views/frame/browser_frame_mus.h"
 #include "content/public/common/mojo_shell_connection.h"
@@ -23,10 +19,5 @@ NativeBrowserFrame* NativeBrowserFrameFactory::Create(
     return new BrowserFrameMus(browser_frame, browser_view);
 #endif
 
-#if defined(USE_ASH)
-  if (ShouldCreateForAshDesktop(browser_view))
-    return new BrowserFrameAsh(browser_frame, browser_view);
-#endif
-
   return new DesktopBrowserFrameAuraLinux(browser_frame, browser_view);
 }