Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/loader/DocumentWriter.h

Index: third_party/WebKit/Source/core/loader/DocumentWriter.h
diff --git a/third_party/WebKit/Source/core/loader/DocumentWriter.h b/third_party/WebKit/Source/core/loader/DocumentWriter.h
index 9d1eb03c0e7b764bf3c160e6318fa0723d8223b1..29546b3ed8743cbe7febe198a140376dd544c1da 100644
--- a/third_party/WebKit/Source/core/loader/DocumentWriter.h
+++ b/third_party/WebKit/Source/core/loader/DocumentWriter.h
@@ -40,10 +40,10 @@ namespace blink {
 class Document;
 class DocumentParser;
 
-class DocumentWriter final : public RefCountedWillBeGarbageCollectedFinalized<DocumentWriter> {
+class DocumentWriter final : public GarbageCollectedFinalized<DocumentWriter> {
     WTF_MAKE_NONCOPYABLE(DocumentWriter);
 public:
-    static PassRefPtrWillBeRawPtr<DocumentWriter> create(Document*, ParserSynchronizationPolicy, const AtomicString& mimeType, const AtomicString& encoding);
+    static RawPtr<DocumentWriter> create(Document*, ParserSynchronizationPolicy, const AtomicString& mimeType, const AtomicString& encoding);
 
     ~DocumentWriter();
     DECLARE_TRACE();
@@ -63,10 +63,10 @@ public:
 private:
     DocumentWriter(Document*, ParserSynchronizationPolicy, const AtomicString& mimeType, const AtomicString& encoding);
 
-    RawPtrWillBeMember<Document> m_document;
+    Member<Document> m_document;
     TextResourceDecoderBuilder m_decoderBuilder;
 
-    RefPtrWillBeMember<DocumentParser> m_parser;
+    Member<DocumentParser> m_parser;
 };
 
 } // namespace blink