Fix GCC segfault with -fauto-profile, for GCC 4.8

This backport r216292 from google/gcc-4_9 branch.
BUG=chromium:430512
TEST=Being tested on 4.9 branch

Change-Id: If6b293df7a1d74e6f1b23dcbcd87a1251296744b
Reviewed-on: https://chromium-review.googlesource.com/228305
Reviewed-by: Yunlian Jiang <[email protected]>
Commit-Queue: Caroline Tice <[email protected]>
Tested-by: Caroline Tice <[email protected]>
1 file changed