Add CSS support for font-variation-settings

third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp

Index: third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
diff --git a/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp b/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
index 02a6b5c162d645d4f09f4d83a8b4c8a562dd6d14..e045165b3ce70e15e8e6fd43a937d21806fcf758 100644
--- a/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
+++ b/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
@@ -1284,7 +1284,11 @@ static inline bool isValidCueStyleProperty(CSSPropertyID id) {
     case CSSPropertyTextDecorationStyle:
     case CSSPropertyTextDecorationColor:
     case CSSPropertyTextDecorationSkip:
-      return RuntimeEnabledFeatures::css3TextDecorationsEnabled();
+      DCHECK(RuntimeEnabledFeatures::css3TextDecorationsEnabled());
+      return true;
+    case CSSPropertyFontVariationSettings:
+      DCHECK(RuntimeEnabledFeatures::cssVariableFontsEnabled());
+      return true;
     default:
       break;
   }
@@ -1387,6 +1391,9 @@ static inline bool isValidFirstLetterStyleProperty(CSSPropertyID id) {
     case CSSPropertyWebkitMarginTopCollapse:
     case CSSPropertyWordSpacing:
       return true;
+    case CSSPropertyFontVariationSettings:
+      DCHECK(RuntimeEnabledFeatures::cssVariableFontsEnabled());
+      return true;
     case CSSPropertyTextDecoration:
       DCHECK(!RuntimeEnabledFeatures::css3TextDecorationsEnabled());
       return true;