Implement SANACLAP (http://bit.ly/sanaclap).

third_party/WebKit/Source/core/style/StyleDifference.h

Index: third_party/WebKit/Source/core/style/StyleDifference.h
diff --git a/third_party/WebKit/Source/core/style/StyleDifference.h b/third_party/WebKit/Source/core/style/StyleDifference.h
index 6b4603096f60de5e25fea2efe592322e22b9552f..9e311d60bf7913ed730f99bfdf8b1bd579cca16d 100644
--- a/third_party/WebKit/Source/core/style/StyleDifference.h
+++ b/third_party/WebKit/Source/core/style/StyleDifference.h
@@ -21,6 +21,7 @@ public:
         BackdropFilterChanged = 1 << 4,
         // The object needs to issue paint invalidations if it is affected by text decorations or properties dependent on color (e.g., border or outline).
         TextDecorationOrColorChanged = 1 << 5,
+        LayoutAffectingPropertyChanged = 1 << 6,
         // If you add a value here, be sure to update the number of bits on m_propertySpecificDifferences.
     };
 
@@ -88,6 +89,9 @@ public:
     bool textDecorationOrColorChanged() const { return m_propertySpecificDifferences & TextDecorationOrColorChanged; }
     void setTextDecorationOrColorChanged() { m_propertySpecificDifferences |= TextDecorationOrColorChanged; }
 
+    bool layoutAffectingPropertyChanged() const { return m_propertySpecificDifferences & LayoutAffectingPropertyChanged; }
+    void setLayoutAffectingPropertyChanged() { m_propertySpecificDifferences |= LayoutAffectingPropertyChanged; }
+
 private:
     enum PaintInvalidationType {
         NoPaintInvalidation = 0,
@@ -103,7 +107,7 @@ private:
     };
     unsigned m_layoutType : 2;
     unsigned m_recomputeOverflow : 1;
-    unsigned m_propertySpecificDifferences : 6;
+    unsigned m_propertySpecificDifferences : 7;
 };
 
 } // namespace blink