Fix 'will execute script' condition for creating custom elements in imports

third_party/WebKit/Source/core/html/parser/HTMLConstructionSite.cpp

Index: third_party/WebKit/Source/core/html/parser/HTMLConstructionSite.cpp
diff --git a/third_party/WebKit/Source/core/html/parser/HTMLConstructionSite.cpp b/third_party/WebKit/Source/core/html/parser/HTMLConstructionSite.cpp
index 98391e7f2cc4021aee338c0a9d23f41fe3e52b95..e6a5f1186594c3bcae3e447e903b0e01fb5998f6 100644
--- a/third_party/WebKit/Source/core/html/parser/HTMLConstructionSite.cpp
+++ b/third_party/WebKit/Source/core/html/parser/HTMLConstructionSite.cpp
@@ -762,7 +762,7 @@ inline Document& HTMLConstructionSite::ownerDocumentForCurrentNode()
 CustomElementDefinition* HTMLConstructionSite::lookUpCustomElementDefinition(Document& document, AtomicHTMLToken* token)
 {
     // "2. If document does not have a browsing context, return null."
-    LocalDOMWindow* window = document.domWindow();
+    LocalDOMWindow* window = document.executingWindow();
     if (!window)
         return nullptr;