Fix a crash for touch for reserved commands.
Fix a crash for touch for reserved commands.

BUG=compile with touch, press alt+d to select the omnibox, crash.
TEST=manually, see bug.

Review URL: http://codereview.chromium.org/6503006

git-svn-id: http://src.chromium.org/svn/trunk/src@74653 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: e0434c36e6c2c98cc90c99625cb4ec43c43282c9
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