Implementation is needed for FileAPI/FileWriter support in WebKit.
Related issue: issue 32624 (Start implementation of the W3C File API)
For reference, a prototype implementation (rough and a bit obsolete) is uploaded at: http://codereview.chromium.org/1102004
I accidentally duplicated this bug, but since all the dependencies here are satisfied, and the ones in the other bug are still there, I'm marking the original as a duplicate.
*** This bug has been marked as a duplicate of bug 44358 ***