Bug 1447358: Unifdef the old style system code. r=jwatt

Summary:
This has been automatically generated using:

  http://dotat.at/prog/unifdef/

And:

find $OBJDIR -type f -name '*.h' |
while read FILE; do
  echo "$FILE"
  unifdef -m -DMOZ_STYLO -UMOZ_OLD_STYLE "$FILE";
done

find $OBJDIR -type f -name '*.cpp' |
while read FILE; do
  echo "$FILE"
  unifdef -m -DMOZ_STYLO -UMOZ_OLD_STYLE "$FILE";
done

MozReview-Commit-ID: I4NdKqbMXzJ

Reviewers: jwatt

Bug #: 1447358

Differential Revision: https://phabricator.services.mozilla.com/D779

dom/html/HTMLTableCellElement.h

@@ -143,9 +143,6 @@ public:
                               nsIPrincipal* aMaybeScriptedPrincipal,
                               nsAttrValue& aResult) override;
   virtual nsMapRuleToAttributesFunc GetAttributeMappingFunction() const override;
-#ifdef MOZ_OLD_STYLE
-  NS_IMETHOD WalkContentStyleRules(nsRuleWalker* aRuleWalker) override;
-#endif
   NS_IMETHOD_(bool) IsAttributeMapped(const nsAtom* aAttribute) const override;
   // Get mapped attributes of ancestor table, if any
   nsMappedAttributes* GetMappedAttributesInheritedFromTable() const;