Remove ResourceFetcher's access to a FrameFetchContext when detaching

Source/core/loader/DocumentLoader.cpp

Index: Source/core/loader/DocumentLoader.cpp
diff --git a/Source/core/loader/DocumentLoader.cpp b/Source/core/loader/DocumentLoader.cpp
index 23d5ec9197acc0cd384b638d8f36e33fe0c86074..3c52b29e41c85bebc5c09413d99d3622e3cc3db4 100644
--- a/Source/core/loader/DocumentLoader.cpp
+++ b/Source/core/loader/DocumentLoader.cpp
@@ -108,7 +108,6 @@ ResourceLoader* DocumentLoader::mainResourceLoader() const
 DocumentLoader::~DocumentLoader()
 {
     ASSERT(!m_frame || !isLoading());
-    static_cast<FrameFetchContext&>(m_fetcher->context()).clearDocumentLoader();
     clearMainResourceHandle();
     m_applicationCacheHost->dispose();
 }
@@ -563,6 +562,7 @@ void DocumentLoader::detachFromFrame()
     // frame have any loads active, so go ahead and kill all the loads.
     stopLoading();
 
+    m_fetcher->clearContext();
     m_applicationCacheHost->setApplicationCache(0);
     WeakIdentifierMap<DocumentLoader>::notifyObjectDestroyed(this);
     m_frame = 0;