https://bugs.webkit.org/show_bug.cgi?id=48436

Reviewed by Darin Adler.

WebCore: 

* page/DOMWindow.cpp:
(WebCore::DOMWindow::getMatchedCSSRules): Return rules from all origins if the cross-origin
check is disabled.
* page/Settings.cpp:
(WebCore::Settings::Settings): Initialize m_crossOriginCheckInGetMatchedCSSRulesDisabled.
* page/Settings.h:
(WebCore::Settings::setCrossOriginCheckInGetMatchedCSSRulesDisabled): Added this accessor.
(WebCore::Settings::crossOriginCheckInGetMatchedCSSRulesDisabled): Ditto.

WebKit/mac: 

* Misc/WebKitVersionChecks.h: Added WEBKIT_FIRST_VERSION_WITH_GET_MATCHED_CSS_RULES_RESTRICTIONS.
* WebView/WebView.mm:
(-[WebView _needsUnrestrictedGetMatchedCSSRules]): Added. Returns YES for Safari linked against
versions of WebKit that did not have the cross-origin restrictions in getMatchedCSSRules().
(-[WebView _preferencesChangedNotification:]): Call Settings::setCrossOriginCheckInGetMatchedCSSRulesDisabled()
based on the above.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@70714 268f45cc-cd09-0410-ab3c-d52691b4dbfc