Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/dom/DocumentFragment.h

Index: third_party/WebKit/Source/core/dom/DocumentFragment.h
diff --git a/third_party/WebKit/Source/core/dom/DocumentFragment.h b/third_party/WebKit/Source/core/dom/DocumentFragment.h
index cc36c67600cbef2e7e3979b5820cd64b80ea0645..e881694756578ed12ce8e622a55515326fadb69c 100644
--- a/third_party/WebKit/Source/core/dom/DocumentFragment.h
+++ b/third_party/WebKit/Source/core/dom/DocumentFragment.h
@@ -33,7 +33,7 @@ namespace blink {
 class CORE_EXPORT DocumentFragment : public ContainerNode {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PassRefPtrWillBeRawPtr<DocumentFragment> create(Document&);
+    static RawPtr<DocumentFragment> create(Document&);
 
     void parseHTML(const String&, Element* contextElement, ParserContentPolicy = AllowScriptingContent);
     bool parseXML(const String&, Element* contextElement, ParserContentPolicy = AllowScriptingContent);
@@ -47,7 +47,7 @@ protected:
 
 private:
     NodeType getNodeType() const final;
-    PassRefPtrWillBeRawPtr<Node> cloneNode(bool deep) override;
+    RawPtr<Node> cloneNode(bool deep) override;
     bool childTypeAllowed(NodeType) const override;
 
     bool isDocumentFragment() const = delete; // This will catch anyone doing an unnecessary check.