Remove the forced layout in getComputedStyle for elements in Shadow DOM

third_party/WebKit/Source/core/dom/shadow/ComposedTreeTraversal.cpp

Index: third_party/WebKit/Source/core/dom/shadow/ComposedTreeTraversal.cpp
diff --git a/third_party/WebKit/Source/core/dom/shadow/ComposedTreeTraversal.cpp b/third_party/WebKit/Source/core/dom/shadow/ComposedTreeTraversal.cpp
index cf529209898854c93f3c5d9b727c4ea9740ff308..1e292e5b557e660dc0a0d092125d0c7a12ae5021 100644
--- a/third_party/WebKit/Source/core/dom/shadow/ComposedTreeTraversal.cpp
+++ b/third_party/WebKit/Source/core/dom/shadow/ComposedTreeTraversal.cpp
@@ -155,7 +155,7 @@ ContainerNode* ComposedTreeTraversal::traverseParent(const Node& node, ParentTra
         HTMLSlotElement* slot = finalDestinationSlotFor(node);
         if (!slot)
             return nullptr;
-        return traverseParent(*slot);
+        return traverseParent(*slot, details);
     }
 
     Element* parent = node.parentElement();
@@ -170,7 +170,7 @@ ContainerNode* ComposedTreeTraversal::traverseParent(const Node& node, ParentTra
         return traverseParentForV0(node, details);
 
     ASSERT(!shadowWhereNodeCanBeDistributed(node));
-    return traverseParentOrHost(node);
+    return traverseParentOrHost(node, details);
 }
 
 ContainerNode* ComposedTreeTraversal::traverseParentForV0(const Node& node, ParentTraversalDetails* details)
@@ -178,21 +178,21 @@ ContainerNode* ComposedTreeTraversal::traverseParentForV0(const Node& node, Pare
     if (shadowWhereNodeCanBeDistributed(node)) {
         if (const InsertionPoint* insertionPoint = resolveReprojection(&node)) {
             if (details)
-                details->didTraverseInsertionPoint(insertionPoint);
+                details->didTraverseInsertionPoint();
             // The node is distributed. But the distribution was stopped at this insertion point.
             if (shadowWhereNodeCanBeDistributed(*insertionPoint))
                 return nullptr;
-            return traverseParent(*insertionPoint);
+            return traverseParent(*insertionPoint, details);
         }
         return nullptr;
     }
-    ContainerNode* parent = traverseParentOrHost(node);
+    ContainerNode* parent = traverseParentOrHost(node, details);
     if (isActiveInsertionPoint(*parent))
         return nullptr;
     return parent;
 }
 
-ContainerNode* ComposedTreeTraversal::traverseParentOrHost(const Node& node)
+ContainerNode* ComposedTreeTraversal::traverseParentOrHost(const Node& node, ParentTraversalDetails* details)
 {
     ContainerNode* parent = node.parentNode();
     if (!parent)
@@ -200,6 +200,8 @@ ContainerNode* ComposedTreeTraversal::traverseParentOrHost(const Node& node)
     if (!parent->isShadowRoot())
         return parent;
     ShadowRoot* shadowRoot = toShadowRoot(parent);
+    if (details)
+        details->didTraverseShadowRoot(shadowRoot);
     ASSERT(!shadowRoot->shadowInsertionPointOfYoungerShadowRoot());
     if (!shadowRoot->isYoungest())
         return nullptr;