Fix the overflow clip rect rounding for overflow scrolling

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 a2325fe77835be20065d047ae322709a7a324c04..1a308fd4b8b1a9ac041ff49aedb2d2b252dba2fe 100644
--- a/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintPropertyTreeBuilder.cpp
@@ -462,7 +462,8 @@ void PaintPropertyTreeBuilder::updateOverflowClip(
   } else if (box.hasOverflowClip() || box.styleRef().containsPaint() ||
              (box.isSVGRoot() &&
               toLayoutSVGRoot(box).shouldApplyViewportClip())) {
-    clipRect = box.overflowClipRect(context.current.paintOffset);
+    clipRect = LayoutRect(
+        pixelSnappedIntRect(box.overflowClipRect(context.current.paintOffset)));
   } else {
     if (auto* properties = object.getMutableForPainting().paintProperties()) {
       properties->clearInnerBorderRadiusClip();