Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/modules/imagebitmap/ImageBitmapRenderingContext.h

 // Copyright 2016 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 ImageBitmapRenderingContext_h
 #define ImageBitmapRenderingContext_h
 
 #include "core/html/canvas/CanvasRenderingContext.h"
 #include "core/html/canvas/CanvasRenderingContextFactory.h"
 #include "modules/ModulesExport.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class ImageBitmap;
 
 class MODULES_EXPORT ImageBitmapRenderingContext final : public CanvasRenderingContext {
     DEFINE_WRAPPERTYPEINFO();
 public:
     class Factory : public CanvasRenderingContextFactory {
         WTF_MAKE_NONCOPYABLE(Factory);
     public:
         Factory() {}
         ~Factory() override {}
 
-        PassOwnPtrWillBeRawPtr<CanvasRenderingContext> create(HTMLCanvasElement*, const CanvasContextCreationAttributes&, Document&) override;
+        RawPtr<CanvasRenderingContext> create(HTMLCanvasElement*, const CanvasContextCreationAttributes&, Document&) override;
         CanvasRenderingContext::ContextType getContextType() const override { return CanvasRenderingContext::ContextImageBitmap; }
         void onError(HTMLCanvasElement*, const String& error) override { }
     };
 
     // Script API
     void transferImageBitmap(ImageBitmap*);
 
     // CanvasRenderingContext implementation
     ContextType getContextType() const override { return CanvasRenderingContext::ContextImageBitmap; }
     bool hasAlpha() const override { return m_hasAlpha; }
@@ skipping 14 matching lines @@
 private:
     ImageBitmapRenderingContext(HTMLCanvasElement*, CanvasContextCreationAttributes, Document&);
 
     bool m_hasAlpha;
     RefPtr<Image> m_image;
 };
 
 } // blink
 
 #endif