Basic implementation of @apply

third_party/WebKit/Source/core/css/CSSVariableData.h

Index: third_party/WebKit/Source/core/css/CSSVariableData.h
diff --git a/third_party/WebKit/Source/core/css/CSSVariableData.h b/third_party/WebKit/Source/core/css/CSSVariableData.h
index 5e195110da8a8bf82d3396f8542f655d22ba2a0e..974a9bd4e16a6781bc48b939965d9ce0c9329391 100644
--- a/third_party/WebKit/Source/core/css/CSSVariableData.h
+++ b/third_party/WebKit/Source/core/css/CSSVariableData.h
@@ -5,6 +5,7 @@
 #ifndef CSSVariableData_h
 #define CSSVariableData_h
 
+#include "core/css/StylePropertySet.h"
 #include "core/css/parser/CSSParserToken.h"
 #include "core/css/parser/CSSParserTokenRange.h"
 #include "wtf/RefCounted.h"
@@ -35,6 +36,9 @@ public:
     bool operator==(const CSSVariableData& other) const;
 
     bool needsVariableResolution() const { return m_needsVariableResolution; }
+
+    const StylePropertySet* propertySet();
+
 private:
     CSSVariableData(const CSSParserTokenRange&, bool needsVariableResolution);
 
@@ -46,6 +50,7 @@ private:
         : m_backingString(backingString)
         , m_tokens(resolvedTokens)
         , m_needsVariableResolution(false)
+        , m_cachedPropertySet(false)
     { }
 
     void consumeAndUpdateTokens(const CSSParserTokenRange&);
@@ -54,6 +59,10 @@ private:
     String m_backingString;
     Vector<CSSParserToken> m_tokens;
     const bool m_needsVariableResolution;
+
+    // Parsed representation for @apply
+    bool m_cachedPropertySet;
+    RefPtrWillBePersistent<StylePropertySet> m_propertySet;
 };
 
 } // namespace blink