Storage of ComputedStyle separate from LayoutObject.

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 ad733eb0c4ddb3bace00238d67d869cb8e823127..07c5d863076fce5e3459ba361029480548363717 100644
--- a/third_party/WebKit/Source/core/dom/Element.cpp
+++ b/third_party/WebKit/Source/core/dom/Element.cpp
@@ -1517,7 +1517,7 @@ void Element::attach(const AttachContext& context)
     // need to clear any state that's been added since then.
     if (hasRareData() && getStyleChangeType() == NeedsReattachStyleChange) {
         ElementRareData* data = elementRareData();
-        data->clearComputedStyle();
+        data->setComputedStyle(nullptr);
     }
 
     if (!isSlotOrActiveInsertionPoint())
@@ -1563,7 +1563,7 @@ void Element::detach(const AttachContext& context)
 
         // attach() will clear the computed style for us when inside recalcStyle.
         if (!document().inStyleRecalc())
-            data->clearComputedStyle();
+            data->setComputedStyle(nullptr);
 
         if (ElementAnimations* elementAnimations = data->elementAnimations()) {
             if (context.performingReattach) {
@@ -1688,7 +1688,7 @@ void Element::recalcStyle(StyleRecalcChange change, Text* nextTextSibling)
     if (change >= Inherit || needsStyleRecalc()) {
         if (hasRareData()) {
             ElementRareData* data = elementRareData();
-            data->clearComputedStyle();
+            data->setComputedStyle(nullptr);
 
             if (change >= Inherit) {
                 if (ElementAnimations* elementAnimations = data->elementAnimations())
@@ -2791,9 +2791,9 @@ const ComputedStyle* Element::ensureComputedStyle(PseudoId pseudoElementSpecifie
     ComputedStyle* elementStyle = mutableComputedStyle();
     if (!elementStyle) {
         ElementRareData& rareData = ensureElementRareData();
-        if (!rareData.ensureComputedStyle())
+        if (!rareData.computedStyle())
             rareData.setComputedStyle(document().styleForElementIgnoringPendingStylesheets(this));
-        elementStyle = rareData.ensureComputedStyle();
+        elementStyle = rareData.computedStyle();
     }
 
     if (!pseudoElementSpecifier)