Round off error while calculating the background-size: contain/cover.

Source/core/rendering/RenderBoxModelObject.cpp

Index: Source/core/rendering/RenderBoxModelObject.cpp
diff --git a/Source/core/rendering/RenderBoxModelObject.cpp b/Source/core/rendering/RenderBoxModelObject.cpp
index aada21668d2aeabe3d149fa3e8ad5fe5988748ad..79b0f224128da5c843c62afcf167a72543d9af58 100644
--- a/Source/core/rendering/RenderBoxModelObject.cpp
+++ b/Source/core/rendering/RenderBoxModelObject.cpp
@@ -934,7 +934,7 @@ IntSize RenderBoxModelObject::calculateFillTileSize(const FillLayer* fillLayer,
             float verticalScaleFactor = imageIntrinsicSize.height()
                 ? static_cast<float>(positioningAreaSize.height()) / imageIntrinsicSize.height() : 1;
             float scaleFactor = type == Contain ? min(horizontalScaleFactor, verticalScaleFactor) : max(horizontalScaleFactor, verticalScaleFactor);
-            return IntSize(max(1, static_cast<int>(imageIntrinsicSize.width() * scaleFactor)), max(1, static_cast<int>(imageIntrinsicSize.height() * scaleFactor)));
+            return IntSize(max(1, static_cast<int>(round(imageIntrinsicSize.width() * scaleFactor))), max(1, static_cast<int>(round(imageIntrinsicSize.height() * scaleFactor))));

[eseidel, 2013/09/18 18:59:45]

should this just be lround?

        }
     }