interactive_ui_tests should be part of the official builder

interactive_ui_tests should be part of the official builder

Adds interactive_ui_tests to the chrome_official_builder target.
This is in service of making interactive_ui_tests binaries available
for GWS integration tests.

BUG=223222
TEST=Watch the build create interactive_ui_tests.
R=mmoss@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=190700

[mmoss, 2013-03-26 16:24:40]

lgtm

[dhollowa, 2013-03-26 16:42:43]

Committed patchset #1 manually as r190700 (presubmit successful).