Last gyp patch for cross-platform Unix support

Final gyp patch to make use of the new cross-platform POSIX defines toolkit_uses_gtk, os_posix, and use_x11. For lists of source files that use a mix of POSIX and Gtk APIs, toolkit_uses_gtk was given precedence.  Solaris was made to use ALSA also, as libasound has been ported to FreeBSD and Solaris as a wrapper around the native OSS.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=86352

[ruben, 2011-05-20 04:59:19]

Last gyp file patch to make them more cross-platform across the Unix platforms. 
Tony is main reviewer, feedback welcome from Valchev and Kasting.

[tony, 2011-05-20 16:09:37]

LGTM, I will run this through the try bots.

http://codereview.chromium.org/7055003/diff/1/printing/printing.gyp
File printing/printing.gyp (right):

http://codereview.chromium.org/7055003/diff/1/printing/printing.gyp#newcode92
printing/printing.gyp:92: ['toolkit_uses_gtk == 0',{
This one is a bit weird because the other conditions are based on OS (mac/win). 
I probably would have gone with posix and not mac, but toolkit_uses_gtk is fine
too.

[commit-bot: I haz the power, 2011-05-23 18:52:24]

Try job failure for 7055003-1 on linux:
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux&numb...

[ruben, 2011-05-23 21:39:08]

On 2011/05/23 18:52:24, commit-bot wrote:
> Try job failure for 7055003-1 on linux:
>
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux&numb...
Looks like everything goes through fine, except for the check_deps script.  I'm
not sure what those gles2_conform_support files are that the check_deps script
is pulling, as they don't seem to be listed anywhere else, so I don't see any
connection with this gyp patch.

[tony, 2011-05-23 22:07:28]

On 2011/05/23 21:39:08, ruben wrote:
> On 2011/05/23 18:52:24, commit-bot wrote:
> > Try job failure for 7055003-1 on linux:
> >
>
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux&numb...
> Looks like everything goes through fine, except for the check_deps script. 
I'm
> not sure what those gles2_conform_support files are that the check_deps script
> is pulling, as they don't seem to be listed anywhere else, so I don't see any
> connection with this gyp patch.

Yeah, I think it's unrelated.  Committed manually in r86352.