Set ComputedStyle on Node and use that in buildOwnLayout()

third_party/WebKit/Source/core/dom/NodeComputedStyle.h

Index: third_party/WebKit/Source/core/dom/NodeComputedStyle.h
diff --git a/third_party/WebKit/Source/core/dom/NodeComputedStyle.h b/third_party/WebKit/Source/core/dom/NodeComputedStyle.h
index 4d7e9d6db263d9ab79aa80a8c2cc1f26f26cf6b5..5ac89aae7aaba214ba7a69610aa64ef2e586ad6b 100644
--- a/third_party/WebKit/Source/core/dom/NodeComputedStyle.h
+++ b/third_party/WebKit/Source/core/dom/NodeComputedStyle.h
@@ -58,6 +58,27 @@ inline ComputedStyle* Node::mutableComputedStyle() const
     return m_data.m_computedStyle;
 }
 
+inline void Node::setComputedStyle(PassRefPtr<ComputedStyle> computedStyle)

[sashab, 2016/07/07 01:20:35]

This is SO much easier to read now, thx.

+{
+    if (hasRareData() && hasLayoutObject()) {
+        // If the DataUnion is a NodeRareDataBase and has a LayoutObject - set the ComputedStyle on that LayoutObject.
+        m_data.m_rareData->layoutObject()->setStyleInternal(computedStyle);
+    } else if (hasRareData() && !hasLayoutObject()) {
+        // If the DataUnion is an NodeRareDataBase (specifically an ElementRareData) without a LayoutObject- set the ComputedStyle on that LayoutObject.
+        NodeRareData* rareData = this->rareData();
+        DCHECK(rareData->isElementRareData());
+        static_cast<ElementRareData*>(rareData)->setComputedStyle(computedStyle);
+    } else if (!hasRareData() && hasLayoutObject()) {
+        // If the DataUnion is a LayoutObject - set the ComputedStyle on that LayoutObject.
+        m_data.m_layoutObject->setStyleInternal(computedStyle);
+    } else {
+        // If the DataUnion is a ComputedStyle - make it point to the new ComputedStyle passed in. 
+        if (m_data.m_computedStyle)
+            m_data.m_computedStyle->deref();
+        m_data.m_computedStyle = computedStyle.leakRef();
+    }
+}
+
 inline const ComputedStyle* Node::parentComputedStyle() const
 {
     if (isSlotOrActiveInsertionPoint())