WKBaseWin.h is in two places in the source tree, Source/WebKit2/UIProcess/API/C/win/WKBaseWin.h and Source/WebKit2/Shared/API/c/win/WKBaseWin.h. Only the one in Shared is actually used.
Created attachment 85066 [details] Patch
Committed r80574: <http://trac.webkit.org/changeset/80574>