fix skia + windows + gn

xfa.gyp

 {
   "variables": {
     "chromium_code": 1,
     "pdf_enable_v8%": 1,
   },
   "target_defaults": {
     "defines": [
       "PDF_ENABLE_XFA",
     ],
     'msvs_disabled_warnings': [
@@ skipping 22 matching lines @@
       'export_dependent_settings': [
         '<(DEPTH)/v8/src/v8.gyp:v8',
       ],
       "sources":[
         "fxjse/class.cpp",
         "fxjse/context.cpp",
         "fxjse/context.h",
         "fxjse/dynprop.cpp",
         "fxjse/include/cfxjse_arguments.h",
         "fxjse/include/cfxjse_class.h",
-        "fxjse/include/cfxjse_value.h"
+        "fxjse/include/cfxjse_value.h",
         "fxjse/include/fxjse.h",
         "fxjse/runtime.cpp",
         "fxjse/runtime.h",
         "fxjse/scope_inline.h",
         "fxjse/value.cpp",
         "xfa/fxfa/include/fxfa.h",
         "xfa/fxfa/include/fxfa_basic.h",
         "xfa/fxfa/include/fxfa_widget.h",
         "xfa/fxfa/include/xfa_checksum.h",
         "xfa/fxfa/include/xfa_ffapp.h",
@@ skipping 686 matching lines @@
           "sources": [],
         }],
         ["OS == 'mac'", {
           "configurations": {},
           "sources": [],
         }],
       ]
     }
   ]
 }