Fix markAncestorsWithChildNeedsStyleInvalidation to actually mark only ancestors.

Source/core/css/invalidation/StyleInvalidator.cpp

Index: Source/core/css/invalidation/StyleInvalidator.cpp
diff --git a/Source/core/css/invalidation/StyleInvalidator.cpp b/Source/core/css/invalidation/StyleInvalidator.cpp
index 710993a51aa685350679ffb4a04e75f74d696234..f3c7223abbb3f9ba984886a55c593994fd7c4594 100644
--- a/Source/core/css/invalidation/StyleInvalidator.cpp
+++ b/Source/core/css/invalidation/StyleInvalidator.cpp
@@ -18,10 +18,8 @@ namespace WebCore {
 
 void StyleInvalidator::invalidate()
 {
-    if (Element* documentElement = m_document.documentElement()) {
-        if (documentElement->childNeedsStyleInvalidation())
-            invalidate(*documentElement);
-    }
+    if (Element* documentElement = m_document.documentElement())
+        invalidate(*documentElement);
     m_document.clearChildNeedsStyleInvalidation();
     m_document.clearNeedsStyleInvalidation();
     m_pendingInvalidationMap.clear();