GitLab

- Provide windows notifictaion of thread termination

Provide an automatic fallback scan of the linker
list of notifcation callbacks via DllMain.

This fallback is ONLY used if there are no notifications
coming via the linker list.  This allows all existing
code to continue working as it does today, and provides
thread teardown notifcatino on XP even though we use
the LoadLibrary call.

It is a minimal change, suitable for pushing to other
channels (beta? stable?).

r=cpu
BUG=103209
Review URL: http://codereview.chromium.org/8550009

TBR=jar@chromium.org
Review URL: http://codereview.chromium.org/8839001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@113342 0039d316-1c4b-4281-b951-d872f2087c98