Converted from DOM to WebUI for new login method
This patch refactors the use of DOM to WebUI in the DOM/WebUI based login. This includes renaming relevant files, functions, and classes. In addition calls to this code has been updated along with the comments. The flag --dom-login has been changed to --webui-login.
This CL depends on
http://codereview.chromium.org/6973029/.
Patch from Ryan Harrison <
rharrison@chromium.org>
BUG=none
TEST=manual