Allow local_dash reports to be regenerated from the ui.

For simply keeping an eye on local test activity, it's
helpful to have a ui based regenerate click to avoid dropping
into the chroot to update after running tests.

BUG=chromium-os:34919
TEST=result_viewer, then run_remote_tests.sh, then click regenerate.

Change-Id: I8465edee83f91d205401781ab9c5f127becd9979
Reviewed-on: https://gerrit.chromium.org/gerrit/38996
Reviewed-by: Yusuf Mohsinally <mohsinally@google.com>
Reviewed-by: Yusuf Mohsinally <mohsinally@chromium.org>
Commit-Ready: Mike Truty <truty@chromium.org>
Tested-by: Mike Truty <truty@chromium.org>
3 files changed