Remove unused CSSPrimitiveValue::CSS_PARSER_{OPERATOR,INTEGER,IDENTIFIER}

Remove unused CSSPrimitiveValue::CSS_PARSER_{OPERATOR,INTEGER,IDENTIFIER}

CSS_PARSER_INTEGER is only used as an alias for CSS_NUMBER, and the
enums CSS_PARSER_OPERATOR and CSS_PARSER_IDENTIFIER are both unused.

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=180334

[Timothy Loh, 2014-08-14 09:00:42]

(depends on removing CSSParserValue::createCSSValue, which used these:
https://codereview.chromium.org/470903003/)

[eseidel, 2014-08-14 17:27:17]

lgtm

[Timothy Loh, 2014-08-15 05:19:47]

The CQ bit was checked by timloh@chromium.org

[commit-bot: I haz the power, 2014-08-15 05:20:18]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/timloh@chromium.org/476693002/1

[commit-bot: I haz the power, 2014-08-15 06:27:39]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/linux_gpu_trigger...)
  mac_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/mac_gpu/builds/42149)

[commit-bot: I haz the power, 2014-08-15 06:58:00]

Committed patchset #1 (1) as 180334