SVG does not respect overflow:visible.

Source/core/rendering/svg/RenderSVGRoot.cpp

Index: Source/core/rendering/svg/RenderSVGRoot.cpp
diff --git a/Source/core/rendering/svg/RenderSVGRoot.cpp b/Source/core/rendering/svg/RenderSVGRoot.cpp
index f63f5f9a8c9583b583577bff16721aabd575d66e..563a20d6c2d23108977619f652854713f80c4894 100644
--- a/Source/core/rendering/svg/RenderSVGRoot.cpp
+++ b/Source/core/rendering/svg/RenderSVGRoot.cpp
@@ -256,8 +256,9 @@ void RenderSVGRoot::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paint
     PaintInfo childPaintInfo(paintInfo);
     childPaintInfo.context->save();
 
-    // Apply initial viewport clip - not affected by overflow handling
-    childPaintInfo.context->clip(pixelSnappedIntRect(overflowClipRect(paintOffset)));
+    // Apply initial viewport clip, the outermost svg is clipped if auto
+    if (style()->overflowX() == OHIDDEN || style()->overflowX() == OAUTO)
+        childPaintInfo.context->clip(pixelSnappedIntRect(overflowClipRect(paintOffset)));
 
     // Convert from container offsets (html renderers) to a relative transform (svg renderers).
     // Transform from our paint container's coordinate system to our local coords.