DevTools: [CodeMirror] roll CodeMirror to version @e20d175

DevTools: [CodeMirror] roll CodeMirror to version @e20d175

This patch rolls CodeMirror and all of its modes.
This roll also adds "rebeccapurple" support to devtools code
highlighter.

Instructions for CodeMirror rolling could be found here:
https://sites.google.com/a/chromium.org/devtools-codemirror-rolling/

R=apavlov@chromium.org
TBR=apavlov, pfeldman

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=176976

[lushnikov, 2014-06-25 13:20:10]

The CQ bit was checked by lushnikov@chromium.org

[commit-bot: I haz the power, 2014-06-25 13:21:04]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/lushnikov@chromium.org/354833004/1

[lushnikov, 2014-06-25 13:26:53]

The CQ bit was unchecked by lushnikov@chromium.org

[lushnikov, 2014-06-26 10:33:58]

@apavlov: changes to codemirror html/css modes are not backward-compatible;
please take a look on changes in devtools formatters.

[apavlov, 2014-06-26 10:42:05]

LGTM

To be on the safe side, you could split token types by the / +/ Regexp

[lushnikov, 2014-06-26 10:52:40]

Thank you for the review.
Updated patch to use |.split(/ +/)| to split token in CodeMirrorTextEditor for
tokenOverrides
Left formatters with |.split(" ")| as it does no harm there

[lushnikov, 2014-06-26 10:54:26]

Committed patchset #3 manually as r176976 (presubmit successful).