Adjust FrameFetchContext clearing logic when clearing HTMLImportsController

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index cfbbf9405d8d23d12bb14c52b6c4954dd2c35b08..0c62d74ae835d3206f7712a5c853869eb9d488dd 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -820,7 +820,7 @@ void Document::setImportsController(HTMLImportsController* controller)
 {
     ASSERT(!m_importsController || !controller);
     m_importsController = controller;
-    if (!m_importsController)
+    if (!m_importsController && !loader())
         m_fetcher->clearContext();
 }