HTML Imports: styles in removed imports should be applied when it comes back

Source/core/html/imports/LinkImport.cpp

Index: Source/core/html/imports/LinkImport.cpp
diff --git a/Source/core/html/imports/LinkImport.cpp b/Source/core/html/imports/LinkImport.cpp
index bc27571b6073ac47d2844a15cb4405cf3ffac848..0f5a98402111834c736797a14f2553fc1bdad735 100644
--- a/Source/core/html/imports/LinkImport.cpp
+++ b/Source/core/html/imports/LinkImport.cpp
@@ -134,6 +134,12 @@ bool LinkImport::hasLoaded() const
     return m_child && m_child->isDone() && !m_child->loader()->hasError();
 }
 
+void LinkImport::ownerInserted()
+{
+    if (m_child)
+        m_child->ownerInserted();
+}
+
 void LinkImport::trace(Visitor* visitor)
 {
     visitor->trace(m_child);