Paint backgrounds of a table section/row in one display item

third_party/WebKit/Source/core/layout/LayoutBox.h

Index: third_party/WebKit/Source/core/layout/LayoutBox.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutBox.h b/third_party/WebKit/Source/core/layout/LayoutBox.h
index aca950dfdaef5226338fab9bb65e51c04b10e851..015d5ade1d1f7b25c254ab6ab6b4efb623853a3d 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBox.h
+++ b/third_party/WebKit/Source/core/layout/LayoutBox.h
@@ -489,10 +489,10 @@ class CORE_EXPORT LayoutBox : public LayoutBoxModelObject {
 
   void addVisualEffectOverflow();
   LayoutRectOutsets computeVisualEffectOverflowOutsets();
-  void addOverflowFromChild(LayoutBox* child) {
+  void addOverflowFromChild(const LayoutBox* child) {

[wkorman, 2017/03/31 22:15:41]

If modifying signature and it won't be null perhaps just make it const&? Same
below.

[Xianzhu, 2017/03/31 23:26:30]

Done.

     addOverflowFromChild(child, child->locationOffset());
   }
-  void addOverflowFromChild(LayoutBox* child, const LayoutSize& delta);
+  void addOverflowFromChild(const LayoutBox* child, const LayoutSize& delta);

[Xianzhu, 2017/03/31 23:26:30]

Done.

   void clearLayoutOverflow();
   void clearAllOverflows() { m_overflow.reset(); }