Fix more Windows compile errors

Fix more Windows compile errors

- Silence warnings in sky code (unnecessary return)
- Disable some warnings for bison-generated code
- Missing include for htons et al.
- Don't build xdisplaycheck on Windows.

R=jam@chromium.org

Committed: https://chromium.googlesource.com/external/mojo/+/fa2b293fe16a41f775d8875c636767a544161cfd

[ojan, 2014-11-04 01:04:15]

ojan@chromium.org changed reviewers:
+ ojan@chromium.org

[ojan, 2014-11-04 01:04:15]

Is Windows a platform we're trying to support in the short-term?

[scottmg, 2014-11-04 01:12:24]

On 2014/11/04 01:04:15, ojan wrote:
> Is Windows a platform we're trying to support in the short-term?

Up to you. I landed the last one based on
https://groups.google.com/a/chromium.org/d/msg/mojo-reviews/WBrzAwG-74s/zUjsS...
but I can certainly would understand the team deciding they don't want to deal
with it.

[jam, 2014-11-04 01:28:07]

jam@chromium.org changed reviewers:
+ ben@chromium.org

[jam, 2014-11-04 01:29:51]

On 2014/11/04 01:04:15, ojan wrote:
> Is Windows a platform we're trying to support in the short-term?

+ben

Ben and I had chatted and the thinking was given that most of the code isn't
platform dependent, it might not be much of an overhead to support windows. So
we'll setup a windows buildbot and see what happens in practice. There are a
number of developers on the team who prefer windows.

[jam, 2014-11-04 01:30:37]

lgtm

[scottmg, 2014-11-04 03:42:49]

Committed patchset #2 (id:20001) manually as
fa2b293fe16a41f775d8875c636767a544161cfd.

[abarth-chromium, 2014-11-04 03:53:06]

abarth@chromium.org changed reviewers:
+ abarth@chromium.org

[abarth-chromium, 2014-11-04 03:53:06]

I don't think Sky will link on Windows.  We removed all the hacks that used to
exist to make Windows work.