Compensate for source scaling in hidpi mode

third_party/WebKit/Source/core/paint/NinePieceImagePainter.cpp

 // 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.
 
 #include "core/paint/NinePieceImagePainter.h"
 
 #include "core/layout/ImageQualityController.h"
 #include "core/layout/LayoutBoxModelObject.h"
 #include "core/paint/BoxPainter.h"
 #include "core/paint/NinePieceImageGrid.h"
@@ skipping 42 matching lines @@
     RefPtr<Image> image = styleImage->image(m_layoutObject, imageSize, 1);
 
     InterpolationQuality interpolationQuality = BoxPainter::chooseInterpolationQuality(m_layoutObject, image.get(), 0, rectWithOutsets.size());
     InterpolationQuality previousInterpolationQuality = graphicsContext.imageInterpolationQuality();
     graphicsContext.setImageInterpolationQuality(interpolationQuality);
 
     TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "PaintImage", "data",
         InspectorPaintImageEvent::data(m_layoutObject, *styleImage));
 
     for (NinePiece piece = MinPiece; piece < MaxPiece; ++piece) {
-        NinePieceImageGrid::NinePieceDrawInfo drawInfo = grid.getNinePieceDrawInfo(piece);
-
-        // The nine piece grid is computed in unscaled image coordinates but must be drawn using
-        // scaled image coordinates.
-        drawInfo.source.scale(styleImage->imageScaleFactor());
+        NinePieceImageGrid::NinePieceDrawInfo drawInfo = grid.getNinePieceDrawInfo(piece, styleImage->imageScaleFactor());
 
         if (drawInfo.isDrawable) {
             if (drawInfo.isCornerPiece) {
                 graphicsContext.drawImage(image.get(), drawInfo.destination, drawInfo.source, op);
             } else {
                 graphicsContext.drawTiledImage(image.get(), drawInfo.destination,
                     drawInfo.source, drawInfo.tileScale, drawInfo.tileRule.horizontal,
                     drawInfo.tileRule.vertical, op);
             }
         }
     }
 
     graphicsContext.setImageInterpolationQuality(previousInterpolationQuality);
     return true;
 }
 
 } // namespace blink