Fix border radius on composited children.

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

Index: third_party/WebKit/Source/core/paint/PaintLayerClipper.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintLayerClipper.cpp b/third_party/WebKit/Source/core/paint/PaintLayerClipper.cpp
index 8ed7a2e8750bd33e608b4aff16bb47cd6573e0ee..9b8f55a12f905c8e02fb22c628032d3503d028ea 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayerClipper.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintLayerClipper.cpp
@@ -345,9 +345,10 @@ void PaintLayerClipper::calculateRects(
 
   // Update the clip rects that will be passed to child layers.
   if (shouldClipOverflow(context)) {
-    foregroundRect.intersect(
+    LayoutRect offsetOverflowClipRect =
         toLayoutBox(layoutObject)
-            .overflowClipRect(offset, context.overlayScrollbarClipBehavior));
+            .overflowClipRect(offset, context.overlayScrollbarClipBehavior);
+    foregroundRect.intersect(offsetOverflowClipRect);

[chrishtr, 2016/12/02 19:21:47]

Is this just increasing clarity?

[Stephen Chennney, 2016/12/07 21:39:38]

It was for debugging output. I've reverted it.

     if (layoutObject.styleRef().hasBorderRadius())
       foregroundRect.setHasRadius(true);