Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/platform/mhtml/MHTMLParser.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 34 matching lines @@
 
 class ArchiveResource;
 class MIMEHeader;
 class SharedBuffer;
 
 class PLATFORM_EXPORT MHTMLParser final {
     STACK_ALLOCATED();
 public:
     explicit MHTMLParser(SharedBuffer*);
 
-    WillBeHeapVector<RefPtrWillBeMember<ArchiveResource>> parseArchive();
+    HeapVector<Member<ArchiveResource>> parseArchive();
 
     // Translates |contentIDFromMimeHeader| (of the form "<foo@bar.com>")
     // into a cid-scheme URI (of the form "cid:foo@bar.com").
     //
     // Returns KURL() - an invalid URL - if contentID is invalid.
     //
     // See rfc2557 - section 8.3 - "Use of the Content-ID header and CID URLs".
     static KURL convertContentIDToURI(const String& contentID);
 
 private:
-    bool parseArchiveWithHeader(MIMEHeader*, WillBeHeapVector<RefPtrWillBeMember<ArchiveResource>>&);
-    PassRefPtrWillBeRawPtr<ArchiveResource> parseNextPart(const MIMEHeader&, const String& endOfPartBoundary, const String& endOfDocumentBoundary, bool& endOfArchiveReached);
+    bool parseArchiveWithHeader(MIMEHeader*, HeapVector<Member<ArchiveResource>>&);
+    RawPtr<ArchiveResource> parseNextPart(const MIMEHeader&, const String& endOfPartBoundary, const String& endOfDocumentBoundary, bool& endOfArchiveReached);
 
     SharedBufferChunkReader m_lineReader;
 };
 
 } // namespace blink
 
 #endif