Revert of 0ee81dffee040f05a9111e52a8100296a2332cb7:
Revert of 0ee81dffee040f05a9111e52a8100296a2332cb7:

Removed obsolete flag for Chrome.

Change-Id: I819dba9ecd03e4587c04dc3ebfdaf18afc2b0c70

BUG=chromium-os:7214
TEST=Check that --enable-login-images flag is not passed to Chrome.

Review URL: http://codereview.chromium.org/6261005

Review URL: http://codereview.chromium.org/6260006

joshfire/chromiumos-platform-login_manager,chadversary/chromiumos.platform.login_manager,chadversary/chromiumos.platform.login_manager,joshfire/chromiumos-platform-login_manager,joshfire/chromiumos-platform-login_manager,chadversary/chromiumos.platform.login_manager