GitLab

Introduce WTF_USE_EXPORT_MACROS, which will allow us to put shared library import/export
info into the headers rather than in export symbol definition files, but disable it on 
all platforms initially so we can deal with port build issues one port at a time.
        
https://bugs.webkit.org/show_bug.cgi?id=27551


git-svn-id: svn://svn.chromium.org/blink/trunk@81135 bbb929c8-8fbe-4397-9dbb-9b2b20218538