Clean up Marquee-related enums
Created attachment 330586 [details] Patch
Fails on Windows: c:\cygwin\home\buildbot\webkit\source\webcore\rendering\rendermarquee.cpp(95): error C2220: warning treated as error - no 'object' file generated [C:\cygwin\home\buildbot\WebKit\WebKitBuild\Release\Source\WebCore\WebCore.vcxproj] c:\cygwin\home\buildbot\webkit\source\webcore\rendering\rendermarquee.cpp(95): warning C4715: 'WebCore::reverseDirection': not all control paths return a value [C:\cygwin\home\buildbot\WebKit\WebKitBuild\Release\Source\WebCore\WebCore.vcxproj]
https://trac.webkit.org/changeset/226666/webkit
<rdar://problem/36545519>