import ui need net part file.
modify net/ for ui/ need.
comment the no need source for keep it minimum.
if you need using net/ directly, import the full net/.
no use cygwin.
set up python path.
no test isolation.
add ui and view project.
no dependent on skia_webkit
replace compositor with a dummy.
only have Layout tree function, property function.
if you need GPU accelerate, you must restore to the real one, and import the dependent lib, like cc, gpu, ANGLE.
rm no need content include file.
comment no import gyp dependence.
comment slide_out_view because it only using if compositor enable.
bug: now resource is no build!
add compositor_setup.h to gyp