Compensate for source scaling in hidpi mode

third_party/WebKit/Source/core/paint/NinePieceImageGrid.h

 // Copyright 2015 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 NinePieceImageGrid_h
 #define NinePieceImageGrid_h
 
 #include "core/CoreExport.h"
 #include "platform/geometry/FloatRect.h"
 #include "platform/geometry/FloatSize.h"
@@ skipping 61 matching lines @@
         FloatRect destination;
         FloatRect source;
 
         // tileScale and tileRule are only useful for non-corners, i.e. edge and center pieces.
         FloatSize tileScale;
         struct {
             Image::TileRule horizontal;
             Image::TileRule vertical;
         } tileRule;
     };
-    NinePieceDrawInfo getNinePieceDrawInfo(NinePiece) const;
+    NinePieceDrawInfo getNinePieceDrawInfo(NinePiece, float) const;
 
     struct Edge {
         DISALLOW_NEW();
         bool isDrawable() const { return slice > 0 && width > 0; }
         float scale() const { return isDrawable() ? (float)width / slice : 1; }
         int slice;
         int width;
     };
 
 private:
     void setDrawInfoCorner(NinePieceDrawInfo&, NinePiece) const;
     void setDrawInfoEdge(NinePieceDrawInfo&, NinePiece) const;
     void setDrawInfoMiddle(NinePieceDrawInfo&) const;
 
     IntRect m_borderImageArea;
     IntSize m_imageSize;
     Image::TileRule m_horizontalTileRule;
     Image::TileRule m_verticalTileRule;
     bool m_fill;
 
     Edge m_top;
     Edge m_right;
     Edge m_bottom;
     Edge m_left;
 };
 
 } // namespace blink
 
 #endif // NinePieceImageGrid_h