Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/html/LinkManifest.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef LinkManifest_h
 #define LinkManifest_h
 
 #include "core/html/LinkResource.h"
 #include "wtf/Allocator.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class HTMLLinkElement;
 
 class LinkManifest final : public LinkResource {
-    USING_FAST_MALLOC_WILL_BE_REMOVED(LinkManifest);
 public:
 
-    static PassOwnPtrWillBeRawPtr<LinkManifest> create(HTMLLinkElement* owner);
+    static RawPtr<LinkManifest> create(HTMLLinkElement* owner);
 
     ~LinkManifest() override;
 
     // LinkResource
     void process() override;
     LinkResourceType type() const override { return Manifest; }
     bool hasLoaded() const override;
     void ownerRemoved() override;
 
 private:
     explicit LinkManifest(HTMLLinkElement* owner);
 };
 
 } // namespace blink
 
 #endif // LinkManifest_h