Allow cross-origin cssRules access to CORS-fetched stylesheet.

Source/core/css/CSSStyleSheet.h

Index: Source/core/css/CSSStyleSheet.h
diff --git a/Source/core/css/CSSStyleSheet.h b/Source/core/css/CSSStyleSheet.h
index 87cd4fd20410622e205b819bdee43a44466232d8..a26e032201c7c4696f4f1f08ee291680d43d0ec6 100644
--- a/Source/core/css/CSSStyleSheet.h
+++ b/Source/core/css/CSSStyleSheet.h
@@ -36,6 +36,7 @@ class CSSStyleSheet;
 class Document;
 class ExceptionState;
 class MediaQuerySet;
+class SecurityOrigin;
 class StyleSheetContents;
 
 enum StyleSheetUpdateType {
@@ -87,6 +88,8 @@ public:
     MediaQuerySet* mediaQueries() const { return m_mediaQueries.get(); }
     void setMediaQueries(PassRefPtrWillBeRawPtr<MediaQuerySet>);
     void setTitle(const String& title) { m_title = title; }
+    // Set by LinkStyle iff CORS-enabled fetch of stylesheet succeeded from this origin.
+    void setAllowRuleAccessFromOrigin(PassRefPtr<SecurityOrigin> allowedOrigin);
 
     class RuleMutationScope {
         WTF_MAKE_NONCOPYABLE(RuleMutationScope);
@@ -136,6 +139,8 @@ private:
     String m_title;
     RefPtrWillBeMember<MediaQuerySet> m_mediaQueries;
 
+    RefPtr<SecurityOrigin> m_allowRuleAccessFromOrigin;
+
     RawPtrWillBeMember<Node> m_ownerNode;
     RawPtrWillBeMember<CSSRule> m_ownerRule;