Oilpan: Reapply: Remove all the RefPtrs and most of the raw pointers to style

Source/core/html/HTMLLinkElement.cpp

Index: Source/core/html/HTMLLinkElement.cpp
diff --git a/Source/core/html/HTMLLinkElement.cpp b/Source/core/html/HTMLLinkElement.cpp
index b2a8f5b0e34898436374704bf04303866c09515a..36e4aa3846443feb93de1991132bf87f137a0006 100644
--- a/Source/core/html/HTMLLinkElement.cpp
+++ b/Source/core/html/HTMLLinkElement.cpp
@@ -230,7 +230,7 @@ void HTMLLinkElement::removedFrom(ContainerNode* insertionPoint)
     }
     document().styleEngine()->removeStyleSheetCandidateNode(this);
 
-    RefPtr<StyleSheet> removedSheet = sheet();
+    RefPtrWillBeRawPtr<StyleSheet> removedSheet = sheet();
 
     if (m_link)
         m_link->ownerRemoved();
@@ -616,7 +616,7 @@ void LinkStyle::process()
         }
     } else if (m_sheet) {
         // we no longer contain a stylesheet, e.g. perhaps rel or type was changed
-        RefPtr<StyleSheet> removedSheet = m_sheet;
+        RefPtrWillBeRawPtr<StyleSheet> removedSheet = m_sheet.get();
         clearSheet();
         document().removedStyleSheet(removedSheet.get());
     }