The DLL build rules have been changed to generate "{Name}Lib.DLL", but these changes have not yet been applied to the Visual Studio builds.
Created attachment 263433 [details] Patch
You might need to take similar action for JSC.exe and DumpRebderTree.exe. Or, switch to CMake, which should work without further action. It generates a Visual Studio Solution.
Wow! When I switched to CMake, all my issues have been resolved. Thank you for letting me know!
Comment on attachment 263433 [details] Patch Clearing flags on attachment: 263433 Committed r191277: <http://trac.webkit.org/changeset/191277>
All reviewed patches have been landed. Closing bug.