linux: ifdef out Upgrade class to verify we're not using it
linux: ifdef out Upgrade class to verify we're not using it

This works because I removed all usage of it in a previous change.

BUG=9295

Review URL: http://codereview.chromium.org/248009

git-svn-id: http://src.chromium.org/svn/trunk/src@27293 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: d48d6382b71f938e35752889fbd18c51c9701d73
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