CSS Custom Properties (Variables)

Source/core/css/resolver/StyleResolver.cpp

Index: Source/core/css/resolver/StyleResolver.cpp
diff --git a/Source/core/css/resolver/StyleResolver.cpp b/Source/core/css/resolver/StyleResolver.cpp
index 6126f704eb577fe785d9340ae24832bb01b0149d..3b94eb7401647346a51f0f56c19f82dbd9a68523 100644
--- a/Source/core/css/resolver/StyleResolver.cpp
+++ b/Source/core/css/resolver/StyleResolver.cpp
@@ -59,6 +59,7 @@
 #include "core/css/StyleRuleImport.h"
 #include "core/css/StyleSheetContents.h"
 #include "core/css/resolver/AnimatedStyleBuilder.h"
+#include "core/css/resolver/CSSVariableResolver.h"
 #include "core/css/resolver/MatchResult.h"
 #include "core/css/resolver/MediaQueryResult.h"
 #include "core/css/resolver/ScopedStyleResolver.h"
@@ -1331,6 +1332,12 @@ void StyleResolver::applyMatchedProperties(StyleResolverState& state, const Matc
         applyInheritedOnly = true;
     }
 
+    if (RuntimeEnabledFeatures::cssVariablesEnabled() && document().styleEngine().usesVariables()) {
+        applyMatchedProperties<ResolveVariables>(state, matchResult, false, matchResult.beginAuthor(), matchResult.endAuthor(), applyInheritedOnly);
+        // TODO(leviw): stop recalculating every time
+        CSSVariableResolver::resolveVariableDefinitions(state);
+    }
+
     // Now we have all of the matched rules in the appropriate order. Walk the rules and apply
     // high-priority properties first, i.e., those properties that other properties depend on.
     // The order is (1) high-priority not important, (2) high-priority important, (3) normal not important