DevTools: add test to verify simple selector behavior.

DevTools: add test to verify simple selector behavior.

DOMPresentationUtils.simpleSelector behavior used to be fixated in a
couple of tests that dumped default selector in a new style rule section.
This patch adds a separate test for simpleSelector method and removes
the calls to default selector in the affected tests.

This makes it possible to use InspectorTets.addNewRule in these tests

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=179952

[lushnikov, 2014-08-11 13:21:22]

Please, take a look.

This patch is needed for the https://codereview.chromium.org/441873010/ which
affects InspectorTest.addNewRule method.

[apavlov, 2014-08-11 13:25:41]

lgtm

[lushnikov, 2014-08-11 13:26:06]

The CQ bit was checked by lushnikov@chromium.org

[commit-bot: I haz the power, 2014-08-11 13:26:33]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/lushnikov@chromium.org/458213002/40001

[commit-bot: I haz the power, 2014-08-11 14:28:18]

Change committed as 179952