Fix a variable aliasing error.
Fix a variable aliasing error.

TBR=mad
TEST=none
BUG=none

Review URL: http://codereview.chromium.org/395018

git-svn-id: bd64dd6fa6f3f0ed0c0666d1018379882b742947@32059 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

svn2github/chromium-depot-tools,svn2github/chromium-depot-tools,svn2github/chromium-depot-tools