Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/web/ViewportAnchor.h

 /*
  * Copyright (C) 2013 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 33 matching lines @@
 // We support two kinds of anchors, a rotation anchor and a resize anchor.
 class ViewportAnchor {
     STACK_ALLOCATED();
 protected:
     ViewportAnchor(FrameView& rootFrameView, VisualViewport& visualViewport)
         : m_rootFrameView(&rootFrameView)
         , m_visualViewport(&visualViewport)
     {
     }
 
-    RawPtrWillBeMember<FrameView> m_rootFrameView;
-    RawPtrWillBeMember<VisualViewport> m_visualViewport;
+    Member<FrameView> m_rootFrameView;
+    Member<VisualViewport> m_visualViewport;
 };
 
 } // namespace blink
 
 #endif // ViewportAnchor_h