Fix paint invalidation for composited vertical-rl having overflow

third_party/WebKit/Source/core/layout/LayoutView.cpp

Index: third_party/WebKit/Source/core/layout/LayoutView.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutView.cpp b/third_party/WebKit/Source/core/layout/LayoutView.cpp
index bb9eb0ea9d9fd927f44b756ad3b2879672bcff85..aa5b1064b0b1703e9acfbbb9e283d7f382594f1b 100644
--- a/third_party/WebKit/Source/core/layout/LayoutView.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutView.cpp
@@ -294,7 +294,7 @@ LayoutRect LayoutView::visualOverflowRect() const
     // In normal compositing mode, LayoutView doesn't actually apply clipping
     // on its descendants. Instead their visual overflow is propagated to
     // compositor()->m_rootContentLayer for accelerated scrolling.
-    return LayoutRect(documentRect());

[chrishtr, 2016/09/27 18:24:34]

Not your fault, but could you add a TODO to resolve the pixel-snapping issue
with documentRect()?

[Xianzhu, 2016/09/27 18:36:23]

Done.

+    return layoutOverflowRect();
 }
 
 LayoutRect LayoutView::localOverflowRectForPaintInvalidation() const