Do not call updateDistribution() in Node::assingedSlotForBinding()

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

Index: third_party/WebKit/Source/core/dom/Node.cpp
diff --git a/third_party/WebKit/Source/core/dom/Node.cpp b/third_party/WebKit/Source/core/dom/Node.cpp
index d5feaa1f73d247f0c0df0b1925e500de1d7eb700..fce91f74a2247863f6b827301943423a61b5d212 100644
--- a/third_party/WebKit/Source/core/dom/Node.cpp
+++ b/third_party/WebKit/Source/core/dom/Node.cpp
@@ -2300,6 +2300,7 @@ StaticNodeList* Node::getDestinationInsertionPoints() {
 }
 
 HTMLSlotElement* Node::assignedSlot() const {
+  // assignedSlot doesn't need to call updateDistribution().
   DCHECK(!isPseudoElement());
   if (ShadowRoot* root = v1ShadowRootOfParent())
     return root->ensureSlotAssignment().findSlot(*this);
@@ -2307,7 +2308,7 @@ HTMLSlotElement* Node::assignedSlot() const {
 }
 
 HTMLSlotElement* Node::assignedSlotForBinding() {
-  updateDistribution();
+  // assignedSlot doesn't need to call updateDistribution().
   if (ShadowRoot* root = v1ShadowRootOfParent()) {
     if (root->type() == ShadowRootType::Open)
       return root->ensureSlotAssignment().findSlot(*this);