[GTK] Documentation for WEBKIT_DEBUG logging channels is out of date
https://bugs.webkit.org/show_bug.cgi?id=114764

Reviewed by Gustavo Noronha Silva.

* docs/webkitenvironment.xml: Update documentation to reflect current list of
logging channels.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150191 268f45cc-cd09-0410-ab3c-d52691b4dbfc
[GTK] [CMake] Disable the shadow DOM
https://bugs.webkit.org/show_bug.cgi?id=116237

Reviewed by Gustavo Noronha Silva.

* Source/cmake/OptionsGTK.cmake: Disable shadow DOM by default.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150192 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Mac rebaseline. The flakiness dashboard tells us that it started at r150101
but reverting the change locally didn't fix the problem as far as Beth and I checked.

* platform/mac/platform/mac/fast/text/thai-combining-mark-positioning-expected.txt: Added.
* platform/mac/platform/mac/fast/text/webfont-after-tiny-monospace-text-expected.txt: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150193 268f45cc-cd09-0410-ab3c-d52691b4dbfc