https://bugs.webkit.org/show_bug.cgi?id=97821

Patch by Huang Dongsung <luxtella@company100.net> on 2012-09-28
Reviewed by Martin Robinson.

Source/WebKit/gtk:

* WebCoreSupport/DumpRenderTreeSupportGtk.cpp:
(DumpRenderTreeSupportGtk::setCSSCustomFilterEnabled): Pass through to Settings object.
* WebCoreSupport/DumpRenderTreeSupportGtk.h:
(DumpRenderTreeSupportGtk):

Tools:

This feature is disabled via Settings by default, but for testing,
we enable it using layoutTestController.overridePreferences. Add the
necessary plumbing for DRT.

WTR already works because support was added for Apple Mac earlier.

* DumpRenderTree/gtk/DumpRenderTree.cpp:
(resetDefaultsToConsistentValues): Feature is off by default.
* DumpRenderTree/gtk/TestRunnerGtk.cpp:
(TestRunner::overridePreference): Add handling of WebKitCSSCustomFilterEnabled.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@129888 268f45cc-cd09-0410-ab3c-d52691b4dbfc