The following revision refers to this bug:
  https://chromium.googlesource.com/infra/infra.git/+/ef19815c4d99f6c691bfd76ac525bb56980b3178

commit ef19815c4d99f6c691bfd76ac525bb56980b3178
Author: seanmccullough <seanmccullough@google.com>
Date: Tue Jun 14 00:15:09 2016

[som] Add revision range exapansion.

- Add a handler for /api/v1/revrange/:start/:end, redirects to a url for
  fetching all of the revisions expanded in json.
- Adds a som-rev-range element. It's an expand-on-tap widget that works very
  similarly to the old Sheriff-o-Matic.

BUG= 619188 

Review-Url: https://codereview.chromium.org/2058173003

[modify] https://crrev.com/ef19815c4d99f6c691bfd76ac525bb56980b3178/go/src/infra/appengine/sheriff-o-matic/elements/som-extension-build-failure.html
[add] https://crrev.com/ef19815c4d99f6c691bfd76ac525bb56980b3178/go/src/infra/appengine/sheriff-o-matic/elements/som-rev-range.html
[modify] https://crrev.com/ef19815c4d99f6c691bfd76ac525bb56980b3178/go/src/infra/appengine/sheriff-o-matic/main.go
[modify] https://crrev.com/ef19815c4d99f6c691bfd76ac525bb56980b3178/go/src/infra/appengine/sheriff-o-matic/main_test.go
[modify] https://crrev.com/ef19815c4d99f6c691bfd76ac525bb56980b3178/go/src/infra/appengine/sheriff-o-matic/sheriff-o-matic.infra_testing
[modify] https://crrev.com/ef19815c4d99f6c691bfd76ac525bb56980b3178/go/src/infra/appengine/sheriff-o-matic/test/index.html
[add] https://crrev.com/ef19815c4d99f6c691bfd76ac525bb56980b3178/go/src/infra/appengine/sheriff-o-matic/test/som-rev-range-test.html

This is live.