Correctly align memory allocations in the case where we need to allocate memory as far away from the stack as possible, but still as close to the VDSO as we can.
Correctly align memory allocations in the case where we need to allocate memory
as far away from the stack as possible, but still as close to the VDSO as we
can.

BUG=none
TEST=run the tests in a tight loop and notice that they no longer randomly fail
Review URL: http://codereview.chromium.org/1807002

git-svn-id: http://src.chromium.org/svn/trunk/src@45775 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: acb3d66e837dd63f207e9257f2ddab3cbc57032f
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser