Move viewport unit resolution to style recalc time

Source/core/css/resolver/StyleResolver.h

Index: Source/core/css/resolver/StyleResolver.h
diff --git a/Source/core/css/resolver/StyleResolver.h b/Source/core/css/resolver/StyleResolver.h
index 735c39a1734e8ecbdfaaccb74cb2cda2fe1f65dd..db6834e4612f112ea5d0e04e8f5345937f0624d7 100644
--- a/Source/core/css/resolver/StyleResolver.h
+++ b/Source/core/css/resolver/StyleResolver.h
@@ -192,7 +192,7 @@ public:
     void addMediaQueryResults(const MediaQueryResultList&);
     MediaQueryResultList* viewportDependentMediaQueryResults() { return &m_viewportDependentMediaQueryResults; }
     bool hasViewportDependentMediaQueries() const { return !m_viewportDependentMediaQueryResults.isEmpty(); }
-    bool affectedByViewportChange() const;
+    bool mediaQueryAffectedByViewportChange() const;
 
     // FIXME: Regions should not require special logic in StyleResolver.
     bool checkRegionStyle(Element* regionElement);
@@ -200,6 +200,8 @@ public:
     // FIXME: Rename to reflect the purpose, like didChangeFontSize or something.
     void invalidateMatchedPropertiesCache();
 
+    void invalidateViewportDependentMatchedProperties() { m_matchedPropertiesCache.clearViewportDependent(); }
+
     // Exposed for RenderStyle::isStyleAvilable().
     static RenderStyle* styleNotYetAvailable() { return s_styleNotYetAvailable; }