Calculate Background Image Geometries using sub-pixel values

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

Index: third_party/WebKit/Source/core/paint/NinePieceImagePainter.cpp
diff --git a/third_party/WebKit/Source/core/paint/NinePieceImagePainter.cpp b/third_party/WebKit/Source/core/paint/NinePieceImagePainter.cpp
index 2ffe6a12cd2144d04e9f5e3435a065f92b686bdc..402aed20b53aa622d3d1edf95f8ebac134add22d 100644
--- a/third_party/WebKit/Source/core/paint/NinePieceImagePainter.cpp
+++ b/third_party/WebKit/Source/core/paint/NinePieceImagePainter.cpp
@@ -48,14 +48,14 @@ bool NinePieceImagePainter::paint(GraphicsContext* graphicsContext, const Layout
     // doesn't have any understanding of the zoom that is in effect on the tile.
     LayoutRect rectWithOutsets = rect;
     rectWithOutsets.expand(style.imageOutsets(ninePieceImage));
-    IntRect borderImageRect = pixelSnappedIntRect(rectWithOutsets);
+    LayoutRect borderImageRect = rectWithOutsets;
 
-    IntSize imageSize = m_layoutObject.calculateImageIntrinsicDimensions(styleImage, borderImageRect.size(),
-        LayoutBoxModelObject::DoNotScaleByEffectiveZoom);
+    IntSize imageSize = roundedIntSize(m_layoutObject.calculateImageIntrinsicDimensions(styleImage, borderImageRect.size(),
+        LayoutBoxModelObject::DoNotScaleByEffectiveZoom));
 
     IntRectOutsets borderWidths(style.borderTopWidth(), style.borderRightWidth(),
         style.borderBottomWidth(), style.borderLeftWidth());
-    NinePieceImageGrid grid(ninePieceImage, imageSize, borderImageRect, borderWidths);
+    NinePieceImageGrid grid(ninePieceImage, imageSize, pixelSnappedIntRect(borderImageRect), borderWidths);
 
     RefPtr<Image> image = styleImage->image(&m_layoutObject, imageSize, style.effectiveZoom());