buffet: Remove DBusManager class

Move the TestMethod to the Manager, then remove the DBusManager
entirely.  This lets us turn the object at org/chromium/Buffet
into a pure object manager and removes a lot of boilerplate.

BUG=chromium:359190
TEST=buffet_client continues to demonstrate buffet functionality
through the TestMethod, which is now implementated by the Manager.

Change-Id: Ie9ecf0f7dd4dd50a3355ad7b06b8e2cfca71d9f9
Reviewed-on: https://chromium-review.googlesource.com/198760
Tested-by: Christopher Wiley <wiley@chromium.org>
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
Commit-Queue: Alex Vakulenko <avakulenko@chromium.org>
9 files changed
tree: 06f922c1b92ac229bebc5d14ff6e84acf0ad476c
  1. buffet/