[MD History] Fix the 'Remove from history' button.

[MD History] Fix the 'Remove from history' button.

This CL fixes the 'Remove from history' button which was broken by
r411253 and adds a test.

BUG=637199
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Committed: https://crrev.com/4d276ca3e0873ddd68d41de237606d057c20df4b
Cr-Commit-Position: refs/heads/master@{#412129}

[calamity, 2016-08-15 07:11:35]

Description was changed from

==========
[MD History] Fix the 'Remove from history' button.

This CL fixes the 'Remove from history' button which was broken by
r411253 and adds a test.

BUG=637199
==========

to

==========
[MD History] Fix the 'Remove from history' button.

This CL fixes the 'Remove from history' button which was broken by
r411253 and adds a test.

BUG=637199
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation
==========

[calamity, 2016-08-15 07:24:27]

calamity@chromium.org changed reviewers:
+ tsergeant@chromium.org

[tsergeant, 2016-08-16 00:48:53]

lgtm

[calamity, 2016-08-16 00:51:25]

The CQ bit was checked by calamity@chromium.org

[commit-bot: I haz the power, 2016-08-16 00:51:57]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-16 01:51:13]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-08-16 01:53:24]

Description was changed from

==========
[MD History] Fix the 'Remove from history' button.

This CL fixes the 'Remove from history' button which was broken by
r411253 and adds a test.

BUG=637199
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation
==========

to

==========
[MD History] Fix the 'Remove from history' button.

This CL fixes the 'Remove from history' button which was broken by
r411253 and adds a test.

BUG=637199
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Committed: https://crrev.com/4d276ca3e0873ddd68d41de237606d057c20df4b
Cr-Commit-Position: refs/heads/master@{#412129}
==========

[commit-bot: I haz the power, 2016-08-16 01:53:25]

Patchset 2 (id:??) landed as
https://crrev.com/4d276ca3e0873ddd68d41de237606d057c20df4b
Cr-Commit-Position: refs/heads/master@{#412129}