Refactoring: merges task needed args into ExtDisplayTaskArg.

It shortens each FactoryTask's ctor's parameters and improves readibility.

BUG=chrome-os-partner:13170
TEST=manual

Change-Id: Iaf38cbe6e0c0a0520cf8f662abcd687e380a3729
Reviewed-on: https://gerrit.chromium.org/gerrit/33083
Tested-by: Shuo-Peng Liao <deanliao@chromium.org>
Reviewed-by: Jon Salz <jsalz@chromium.org>
Commit-Ready: Shuo-Peng Liao <deanliao@chromium.org>
1 file changed