[Author: aharper]
[Author: aharper]

Move worker thread globals into the right #ifdef guard for SDK version.

R=dmaclach,thomasvl
APPROVED=thomasvl
DELTA=8  (4 added, 4 deleted, 0 changed)

git-svn-id: 741c308154f1e22deafec9707230e8b816ec4ca6@592 7dc7ac4e-7543-0410-b95c-c1676fc8e2a3

chao787/GTM-mirror,chao787/GTM-mirror,chao787/GTM-mirror