Drop GetFrame()->GetDocument() usage in FrameFetchContext

third_party/WebKit/Source/core/loader/DocumentLoader.cpp

Index: third_party/WebKit/Source/core/loader/DocumentLoader.cpp
diff --git a/third_party/WebKit/Source/core/loader/DocumentLoader.cpp b/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
index df7566763b1ddfeb3c30926e2d13de0c4b974e87..0aa3b608dbc37c94fe1f4360399c6de46c93f33c 100644
--- a/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
+++ b/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
@@ -242,9 +242,10 @@ std::unique_ptr<SourceLocation> DocumentLoader::CopySourceLocation() const {
 void DocumentLoader::DispatchLinkHeaderPreloads(
     ViewportDescriptionWrapper* viewport,
     LinkLoader::MediaPreloadPolicy media_policy) {
+  DCHECK_GE(state_, kCommitted);
   LinkLoader::LoadLinksFromHeader(
       GetResponse().HttpHeaderField(HTTPNames::Link), GetResponse().Url(),
-      frame_->GetDocument(), NetworkHintsInterfaceImpl(),
+      *frame_, frame_->GetDocument(), NetworkHintsInterfaceImpl(),
       LinkLoader::kOnlyLoadResources, media_policy, viewport);
 }