Revert of Remove clearing of pending invalidation sets.

third_party/WebKit/Source/core/dom/Element.cpp

Index: third_party/WebKit/Source/core/dom/Element.cpp
diff --git a/third_party/WebKit/Source/core/dom/Element.cpp b/third_party/WebKit/Source/core/dom/Element.cpp
index 95ab1430d8797ae77a02443fd87f9528466d82be..d54240953a41d9654d01dadb43402f3721bc3ebc 100644
--- a/third_party/WebKit/Source/core/dom/Element.cpp
+++ b/third_party/WebKit/Source/core/dom/Element.cpp
@@ -1530,8 +1530,6 @@
         if (ElementAnimations* elementAnimations = data->elementAnimations())
             elementAnimations->cssAnimations().cancel();
     }
-
-    document().styleEngine().styleInvalidator().clearInvalidation(*this);
 }
 
 void Element::attach(const AttachContext& context)
@@ -1617,6 +1615,8 @@
             document().activeChainNodeDetached(*this);
         document().userActionElements().didDetach(*this);
     }
+
+    document().styleEngine().styleInvalidator().clearInvalidation(*this);
 
     if (svgFilterNeedsLayerUpdate())
         document().unscheduleSVGFilterLayerUpdateHack(*this);