The pow() workaround in Source/WTF/wtf/MathExtras.h for MinGW-w64 is no longer required in the latest version of MinGW-w64. Only enable the workaround if it is required.
Created attachment 181312 [details] Patch
Created attachment 181412 [details] Patch
There is a warning generated if __MINGW64_VERSION_RC is not defined and compiling with -Wundef so I added another check if it is defined.
Comment on attachment 181412 [details] Patch Attachment 181412 [details] did not pass chromium-ews (chromium-xvfb): Output: http://queues.webkit.org/results/15708445 New failing tests: inspector-protocol/debugger-terminate-dedicated-worker-while-paused.html
Comment on attachment 181412 [details] Patch Clearing flags on attachment: 181412 Committed r138903: <http://trac.webkit.org/changeset/138903>
All reviewed patches have been landed. Closing bug.