When value is 0xFFFFFFFF, implementation returns 18446744073709552000, which I think is 0xFFFFFFFFFFFFFFFF with rounding.
This bug caused LayoutTests/fast/canvas/webgl/gl-get-calls.html to fail. These tests have been removed until this bug is fixed
Created attachment 64274 [details] patch
Test is in sync with khronos conformance tests.
Comment on attachment 64274 [details] patch Looks good.
Comment on attachment 64274 [details] patch ok.
Committed r65279: <http://trac.webkit.org/changeset/65279>