Hi, the definition of FILE_PATH_LITERAL on Windows is, 
#define FILE_PATH_LITERAL(x) L ## x

this causes compile error,
FAILED: ninja -t msvc -e environment.x86 -- "C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\bin\cl.exe" /nologo /showIncludes /FC @obj\xwalk\application\browser\xwalk_application_lib.application.obj.rsp /c ..\..\xwalk\application\browser\application.cc /Foobj\xwalk\application\browser\xwalk_application_lib.application.obj /Fdobj\xwalk\xwalk_application_lib.cc.pdb 
c:\users\build\xwalk\src\xwalk\application\browser\application.cc(163) : error C2065: 'LkWidgetEntryPagePattern' : undeclared identifier
ninja: build stopped: subcommand failed.