Decouple IsMetroProcess() calls, introducing IsSingleWindowMetroMode().

win8/win8.gyp

 # 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.
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/win_precompile.gypi',
   ],
@@ skipping 17 matching lines @@
             '<(output_path)'
           ],
           'action': ['python',
                      '<(check_sdk_script)',
                      '<(windows_sdk_path)',
                      '<(output_path)',
                      ],
         },
       ],
     },
+    {
+      'target_name': 'win8_util',
+      'type': 'static_library',
+      'dependencies': [
+        '../base/base.gyp:base',
+      ],
+      'sources': [
+        'util/win8_util.cc',
+        'util/win8_util.h',
+      ],
+    },
   ],
 }