https://bugs.webkit.org/show_bug.cgi?id=105886

Reviewed by Gustavo Noronha Silva.

Rather than including files in the sources list in an OS-specific way,
guard specific files with OS(UNIX|WINDOWS), USE((GLIB|ICU)_UNICODE) guards
and include all of them in the list.

Proper comments for namespace and #if guard closings are also added or adjusted
where necessary in the affected files.

* GNUmakefile.list.am:
* wtf/OSAllocatorPosix.cpp: Add OS(UNIX) guards.
* wtf/OSAllocatorWin.cpp: Add OS(WINDOWS) guards.
* wtf/ThreadSpecificWin.cpp: Ditto.
* wtf/ThreadingWin.cpp: Ditto.
* wtf/unicode/glib/UnicodeGLib.cpp: Add USE(GLIB_UNICODE) guards.
(WTF):
* wtf/unicode/glib/UnicodeGLib.h: Ditto.
(WTF):
* wtf/unicode/icu/CollatorICU.cpp: Style changes.
* wtf/unicode/icu/UnicodeIcu.h: Add USE(ICU_UNICODE) guards.
(WTF):
* wtf/win/OwnPtrWin.cpp: Add OS(WINDOWS) guards.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@139974 268f45cc-cd09-0410-ab3c-d52691b4dbfc