Include the outline into the visual overflow

Source/core/rendering/RenderRegion.cpp

Index: Source/core/rendering/RenderRegion.cpp
diff --git a/Source/core/rendering/RenderRegion.cpp b/Source/core/rendering/RenderRegion.cpp
index 36a6b5858f955c85015e76cc164a56bd98bba309..ad7f4f84aa479458323852008acfefbb17a675c0 100644
--- a/Source/core/rendering/RenderRegion.cpp
+++ b/Source/core/rendering/RenderRegion.cpp
@@ -81,19 +81,18 @@ LayoutRect RenderRegion::overflowRectForFlowThreadPortion(const LayoutRect& flow
     LayoutRect flowThreadOverflow = m_flowThread->visualOverflowRect();
 
     // Only clip along the flow thread axis.
-    LayoutUnit outlineSize = maximalOutlineSize(PaintPhaseOutline);
     LayoutRect clipRect;
     if (m_flowThread->isHorizontalWritingMode()) {
-        LayoutUnit minY = isFirstPortion ? (flowThreadOverflow.y() - outlineSize) : flowThreadPortionRect.y();
-        LayoutUnit maxY = isLastPortion ? max(flowThreadPortionRect.maxY(), flowThreadOverflow.maxY()) + outlineSize : flowThreadPortionRect.maxY();
-        LayoutUnit minX = min(flowThreadPortionRect.x(), flowThreadOverflow.x() - outlineSize);
-        LayoutUnit maxX = max(flowThreadPortionRect.maxX(), (flowThreadOverflow.maxX() + outlineSize));
+        LayoutUnit minY = isFirstPortion ? flowThreadOverflow.y() : flowThreadPortionRect.y();
+        LayoutUnit maxY = isLastPortion ? max(flowThreadPortionRect.maxY(), flowThreadOverflow.maxY()) : flowThreadPortionRect.maxY();
+        LayoutUnit minX = min(flowThreadPortionRect.x(), flowThreadOverflow.x());
+        LayoutUnit maxX = max(flowThreadPortionRect.maxX(), flowThreadOverflow.maxX());
         clipRect = LayoutRect(minX, minY, maxX - minX, maxY - minY);
     } else {
-        LayoutUnit minX = isFirstPortion ? (flowThreadOverflow.x() - outlineSize) : flowThreadPortionRect.x();
-        LayoutUnit maxX = isLastPortion ? max(flowThreadPortionRect.maxX(), flowThreadOverflow.maxX()) + outlineSize : flowThreadPortionRect.maxX();
-        LayoutUnit minY = min(flowThreadPortionRect.y(), (flowThreadOverflow.y() - outlineSize));
-        LayoutUnit maxY = max(flowThreadPortionRect.y(), (flowThreadOverflow.maxY() + outlineSize));
+        LayoutUnit minX = isFirstPortion ? flowThreadOverflow.x() : flowThreadPortionRect.x();
+        LayoutUnit maxX = isLastPortion ? max(flowThreadPortionRect.maxX(), flowThreadOverflow.maxX()) : flowThreadPortionRect.maxX();
+        LayoutUnit minY = min(flowThreadPortionRect.y(), (flowThreadOverflow.y()));
+        LayoutUnit maxY = max(flowThreadPortionRect.y(), (flowThreadOverflow.maxY()));
         clipRect = LayoutRect(minX, minY, maxX - minX, maxY - minY);
     }