Hook up style invalidation for CSS Paint API.

third_party/WebKit/Source/core/css/parser/CSSVariableParser.h

Index: third_party/WebKit/Source/core/css/parser/CSSVariableParser.h
diff --git a/third_party/WebKit/Source/core/css/parser/CSSVariableParser.h b/third_party/WebKit/Source/core/css/parser/CSSVariableParser.h
index dadf926ceacd97170ef931b2d5a4535af54da04a..ea61231189c671bdc3ba2000b2ecc483948bfb53 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSVariableParser.h
+++ b/third_party/WebKit/Source/core/css/parser/CSSVariableParser.h
@@ -5,6 +5,7 @@
 #ifndef CSSVariableParser_h
 #define CSSVariableParser_h
 
+#include "core/CoreExport.h"
 #include "core/css/parser/CSSParserTokenRange.h"
 #include "platform/heap/Handle.h"
 #include "wtf/RefPtr.h"
@@ -14,7 +15,7 @@ namespace blink {
 
 class CSSCustomPropertyDeclaration;
 
-class CSSVariableParser {
+class CORE_EXPORT CSSVariableParser {
 public:
     static bool containsValidVariableReferences(CSSParserTokenRange);