Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/modules/webgl/WebGLExtension.h

 /*
  * Copyright (C) 2010 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 27 matching lines @@
     STACK_ALLOCATED();
     WTF_MAKE_NONCOPYABLE(WebGLExtensionScopedContext);
 public:
     explicit WebGLExtensionScopedContext(WebGLExtension*);
     ~WebGLExtensionScopedContext();
 
     bool isLost() const { return !m_context; }
     WebGLRenderingContextBase* context() const { return m_context.get(); }
 
 private:
-    RefPtrWillBeMember<WebGLRenderingContextBase> m_context;
+    Member<WebGLRenderingContextBase> m_context;
 };
 
 class WebGLExtension : public GarbageCollectedFinalized<WebGLExtension>, public ScriptWrappable {
 public:
     virtual ~WebGLExtension();
     virtual WebGLExtensionName name() const = 0;
 
     // Lose this extension. Passing true = force loss. Some extensions
     // like WEBGL_lose_context are not normally lost when the context
     // is lost but must be lost when destroying their WebGLRenderingContextBase.
@@ skipping 13 matching lines @@
             return m_context->canvas();
         return nullptr;
     }
 
 protected:
     explicit WebGLExtension(WebGLRenderingContextBase*);
 
 private:
     friend WebGLExtensionScopedContext;
 
-    RawPtrWillBeWeakMember<WebGLRenderingContextBase> m_context;
+    WeakMember<WebGLRenderingContextBase> m_context;
 };
 
 } // namespace blink
 
 #endif // WebGLExtension_h