SVG root viewport clip in paint property tree

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

Index: third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.cpp b/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.cpp
index 3c4014a6451f100731fc363f8e298b447f8d4da2..47e0f7cb5f95d9d4c1bb90c115e35ec5312b862c 100644
--- a/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.cpp
@@ -343,7 +343,7 @@ void PaintPropertyTreeBuilder::updateOverflowClip(const LayoutObject& object, Pa
     LayoutRect clipRect;
     if (box.hasControlClip()) {
         clipRect = box.controlClipRect(context.current.paintOffset);
-    } else if (box.hasOverflowClip()) {
+    } else if (box.hasOverflowClip() || (box.isSVGRoot() && toLayoutSVGRoot(box).shouldApplyViewportClip())) {
         clipRect = box.overflowClipRect(context.current.paintOffset);
     } else {
         if (ObjectPaintProperties* properties = object.getMutableForPainting().objectPaintProperties())