Refactor ImageBuffer to make OffscreenCanvas match HTMLCanvasElement

third_party/WebKit/Source/core/html/canvas/ImageElementBase.h

 // Copyright 2017 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 ImageElementBase_h
 #define ImageElementBase_h
 
 #include "core/CoreExport.h"
 #include "core/html/canvas/CanvasImageSource.h"
 #include "core/imagebitmap/ImageBitmapSource.h"
@@ skipping 13 matching lines @@
   IntSize BitmapSourceSize() const override;
   ScriptPromise CreateImageBitmap(ScriptState*,
                                   EventTarget&,
                                   Optional<IntRect>,
                                   const ImageBitmapOptions&,
                                   ExceptionState&) override;
 
   PassRefPtr<Image> GetSourceImageForCanvas(SourceImageStatus*,
                                             AccelerationHint,
                                             SnapshotReason,
-                                            const FloatSize&) const override;
+                                            const FloatSize&) override;
 
   bool WouldTaintOrigin(
       SecurityOrigin* destination_security_origin) const override;
 
   FloatSize ElementSize(const FloatSize& default_object_size) const override;
   FloatSize DefaultDestinationSize(
       const FloatSize& default_object_size) const override;
 
   bool IsAccelerated() const override;
 
   int SourceWidth() override;
   int SourceHeight() override;
 
   bool IsSVGSource() const override;
 
   bool IsOpaque() const override;
 
   const KURL& SourceURL() const override;
 
   ImageResourceContent* CachedImage() const;
 
  private:
   const Element& GetElement() const;
 };
 
 }  // namespace blink
 
 #endif  // ImageElementBase_h