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

base/win/win_util.cc

Index: base/win/win_util.cc
diff --git a/base/win/win_util.cc b/base/win/win_util.cc
index a37e0f270ae7f3a97a26b0be97e2c42b31182e7c..57bee8a57a785681636019e982baffed214b603a 100644
--- a/base/win/win_util.cc
+++ b/base/win/win_util.cc
@@ -30,7 +30,6 @@
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_restrictions.h"
-#include "base/win/metro.h"
 #include "base/win/registry.h"
 #include "base/win/scoped_co_mem.h"
 #include "base/win/scoped_handle.h"
@@ -532,8 +531,6 @@ bool DismissVirtualKeyboard() {
   return false;
 }
 
-typedef HWND (*MetroRootWindow) ();
-
 enum DomainEnrollementState {UNKNOWN = -1, NOT_ENROLLED, ENROLLED};
 static volatile long int g_domain_state = UNKNOWN;