Converting firmware_ECPowerButton to use new FirmwareTest class.

The new FirmwareTest class does not require the traditional dict of objects
that FAFTSequence required.

1. Converted the test to use the new flat function call style.

BUG=chromium:371185
TEST=Manually ran this test at desk against peppy

Change-Id: I4fce1b781322e81cd16130755f356c1237560228
Reviewed-on: https://chromium-review.googlesource.com/200105
Reviewed-by: Vic Yang <victoryang@chromium.org>
Commit-Queue: Yusuf Mohsinally <mohsinally@chromium.org>
Tested-by: Yusuf Mohsinally <mohsinally@chromium.org>
1 file changed