Add the named color `rebeccapurple` (#639)

Add the named color `rebeccapurple` (#639)

http://dev.w3.org/csswg/css-color-4/#valuedef-rebeccapurple

Contributed by Mathias Bynens <mathiasb@opera.com>;.

BUG=384254
TBR=esprehn

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=179321

[mathiasb, 2014-07-31 13:04:54]

This is https://codereview.chromium.org/330243002 (already LGTM’d) re-uploaded
with the correct base URL.

[commit-bot: I haz the power, 2014-07-31 13:05:45]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/mathias@qiwi.be/432773002/1

[commit-bot: I haz the power, 2014-07-31 13:05:46]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-07-31 13:05:47]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[esprehn, 2014-07-31 14:17:39]

Lgtm

[esprehn, 2014-07-31 14:17:44]

The CQ bit was checked by esprehn@chromium.org

[commit-bot: I haz the power, 2014-07-31 14:18:07]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/mathias@qiwi.be/432773002/1

[commit-bot: I haz the power, 2014-07-31 15:43:31]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_blink_dbg on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/linux_blink_dbg/builds/1...)

[commit-bot: I haz the power, 2014-07-31 16:50:08]

Change committed as 179321