Inflate dirty rect by 1 pixel on a high DPI display

third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010, 2011, 2012 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 68 matching lines @@
         }
         CanvasRenderingContext::ContextType getContextType() const override { return CanvasRenderingContext::Context2d; }
     };
 
     ~CanvasRenderingContext2D() override;
 
     void setCanvasGetContextResult(RenderingContext&) final;
 
     bool isContextLost() const override;
 
+    bool shouldAntialias() const override;
     void setShouldAntialias(bool) override;
 
     void scrollPathIntoView();
     void scrollPathIntoView(Path2D*);
 
     void clearRect(double x, double y, double width, double height) override;
 
     void reset() override;
 
     String font() const;
@@ skipping 119 matching lines @@
     HashMap<String, Font> m_fontsResolvedUsingCurrentStyle;
     bool m_pruneLocalFontCacheScheduled;
     ListHashSet<String> m_fontLRUList;
 };
 
 DEFINE_TYPE_CASTS(CanvasRenderingContext2D, CanvasRenderingContext, context, context->is2d(), context.is2d());
 
 } // namespace blink
 
 #endif // CanvasRenderingContext2D_h