Bug 1241373 - Make nsStyleSet::GetAuthorStyleDisabled const. r=dholbert

layout/style/nsStyleSet.cpp

@@ -691,7 +691,7 @@ nsStyleSet::DirtyRuleProcessors(SheetType aType)
 }
 
 bool
-nsStyleSet::GetAuthorStyleDisabled()
+nsStyleSet::GetAuthorStyleDisabled() const
 {
   return mAuthorStyleDisabled;
 }

layout/style/nsStyleSet.h

@@ -326,7 +326,7 @@ class nsStyleSet final
                                   mozilla::CSSStyleSheet* aReferenceSheet);
 
   // Enable/Disable entire author style level (Doc, ScopedDoc & PresHint levels)
-  bool GetAuthorStyleDisabled();
+  bool GetAuthorStyleDisabled() const;
   nsresult SetAuthorStyleDisabled(bool aStyleDisabled);
 
   int32_t SheetCount(mozilla::SheetType aType) const {