Correct skia source file exclusion when building on Windows.

skia/skia.gyp

 # Copyright (c) 2011 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.
 
 {
   'targets': [
     {
       'target_name': 'skia',
       'type': '<(component)',
       'sources': [
@@ skipping 794 matching lines @@
               'defines': [
                 'SK_SUPPORT_888_TEXT',
                 'SK_USE_MAC_CORE_TEXT',
               ],
             }],
           ],
         }],
         [ 'OS == "win"', {
           'sources!': [
             '../third_party/skia/src/core/SkMMapStream.cpp',
-            '../third_party/skia/src/ports/SkTime_Unix.cc',
+            '../third_party/skia/src/ports/SkTime_Unix.cpp',
             'ext/SkThread_chrome.cc',
           ],
           'include_dirs': [
             'config/win',
           ],
           'direct_dependent_settings': {
             'include_dirs': [
               'config/win',
             ],
           },
@@ skipping 175 matching lines @@
       ],
     },
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: