Remove indirection plumbing from HTMLImportChild.

Source/core/dom/custom/CustomElementMicrotaskImportStep.cpp

Index: Source/core/dom/custom/CustomElementMicrotaskImportStep.cpp
diff --git a/Source/core/dom/custom/CustomElementMicrotaskImportStep.cpp b/Source/core/dom/custom/CustomElementMicrotaskImportStep.cpp
index d7f8ae346316e2d213a634c9a9591fb8470e36b2..11f7417cd720192a0812712e4a3d5e6cda8aca98 100644
--- a/Source/core/dom/custom/CustomElementMicrotaskImportStep.cpp
+++ b/Source/core/dom/custom/CustomElementMicrotaskImportStep.cpp
@@ -63,7 +63,7 @@ void CustomElementMicrotaskImportStep::parentWasChanged()
 
 bool CustomElementMicrotaskImportStep::shouldWaitForImport() const
 {
-    return m_import && !m_import->isLoaded();
+    return m_import && !m_import->loader()->isDone();
 }
 
 void CustomElementMicrotaskImportStep::didUpgradeAllCustomElements()