Remove courgette version tests. Add bsdiff version tests.

Remove courgette version tests.  Add bsdiff version tests.

The component updater now only uses bsdiff so courgete diffs no longer have to forwards and backwards compatible, since Chrome always ships the correct version of the courgette patcher with the courgette diff.

However, bsdiff generated diffs still have to be version compatible.

This CL adds a test for the forwards compatible case.

BUG=459505
Committed: https://crrev.com/23543f0d6b0b45854c447a1d5024add9e33a4150
Cr-Commit-Position: refs/heads/master@{#317117}

[Will Harris, 2015-02-18 06:44:01]

wfh@chromium.org changed reviewers:
+ dgarrett@chromium.org

[Will Harris, 2015-02-19 09:07:29]

Ping dgarrett

[tommi (sloooow) - chröme, 2015-02-19 19:00:34]

tommi@chromium.org changed reviewers:
+ tommi@chromium.org

[tommi (sloooow) - chröme, 2015-02-19 19:00:34]

lgtm

[dgarrett, 2015-02-19 19:02:03]

On 2015/02/19 19:00:34, tommi wrote:
> lgtm

lgtm to me as well.

[Will Harris, 2015-02-19 19:27:26]

The CQ bit was checked by wfh@chromium.org

[Will Harris, 2015-02-19 19:27:41]

thanks

+waffles for info

now we see if the CQ can commit binaries.

[commit-bot: I haz the power, 2015-02-19 19:29:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/918403003/1

[commit-bot: I haz the power, 2015-02-19 20:03:43]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-19 20:05:03]

Patchset 1 (id:??) landed as
https://crrev.com/23543f0d6b0b45854c447a1d5024add9e33a4150
Cr-Commit-Position: refs/heads/master@{#317117}