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

ui/base/ime/input_method_factory.cc

 // Copyright (c) 2012 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 "ui/base/ime/input_method_factory.h"
 
 #include "build/build_config.h"
 #include "ui/base/ime/mock_input_method.h"
 
 #if defined(OS_CHROMEOS)
 #include "ui/base/ime/input_method_chromeos.h"
 #elif defined(OS_WIN)
-#include "base/win/metro.h"
 #include "ui/base/ime/input_method_win.h"
 #include "ui/base/ime/remote_input_method_win.h"
 #elif defined(OS_MACOSX)
 #include "ui/base/ime/input_method_mac.h"
 #elif defined(USE_AURA) && defined(OS_LINUX) && defined(USE_X11) && \
       !defined(OS_CHROMEOS)
 #include "ui/base/ime/input_method_auralinux.h"
 #elif defined(OS_ANDROID)
 #include "ui/base/ime/input_method_android.h"
 #else
@@ skipping 55 matching lines @@
       << "ui::SetUpInputMethodFactoryForTesting earlier.";
 
   g_input_method_set_for_testing = true;
 }
 
 void SetUpInputMethodForTesting(InputMethod* input_method) {
   g_input_method_for_testing = input_method;
 }
 
 }  // namespace ui