Source/PlatformWin.cmake - external/github.com/WebKit/webkit - Git at Google

 if (EXISTS ${CMAKE_SOURCE_DIR}/../Internal/Tools/WKTestBrowser/CMakeLists.txt)
     add_subdirectory(${CMAKE_SOURCE_DIR}/../Internal/Tools/WKTestBrowser ${CMAKE_CURRENT_BINARY_DIR}/WKTestBrowser)
 endif ()
	if (EXISTS ${CMAKE_SOURCE_DIR}/../Internal/Tools/WKTestBrowser/CMakeLists.txt)
	add_subdirectory(${CMAKE_SOURCE_DIR}/../Internal/Tools/WKTestBrowser ${CMAKE_CURRENT_BINARY_DIR}/WKTestBrowser)
	endif ()