Web Inspector: check for the number of parsed css properties.

Web Inspector: check for the number of parsed css properties.
https://bugs.webkit.org/show_bug.cgi?id=80268

Reviewed by Vsevolod Vlasov.

Source/WebCore:

Test: inspector/styles/set-property-boundaries.html

* inspector/InspectorCSSAgent.cpp:
(WebCore::InspectorCSSAgent::didRemoveDOMNode):
* inspector/InspectorStyleSheet.cpp:
(WebCore::InspectorStyle::setPropertyText):

LayoutTests:

* inspector/styles/set-property-boundaries-expected.txt: Added.
* inspector/styles/set-property-boundaries.html: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@109741 268f45cc-cd09-0410-ab3c-d52691b4dbfc