ScrollRectToVisible should bubble up through its layout container.

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

Index: third_party/WebKit/Source/core/layout/LayoutBox.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBox.cpp b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
index 8528d71253edfe1745b63b60d47b2ffeede3521e..1bb991963a5ab26d9b324a31554e501c4e62c994 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBox.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
@@ -575,9 +575,9 @@ void LayoutBox::scrollRectToVisible(const LayoutRect& rect, const ScrollAlignmen
     LayoutRect newRect = rectToScroll;
 
     bool restrictedByLineClamp = false;
-    if (parent()) {
-        parentBox = parent()->enclosingBox();
-        restrictedByLineClamp = !parent()->style()->lineClamp().isNone();
+    if (container()) {
+        parentBox = container()->enclosingBox();

[bokan, 2016/09/15 20:54:41]

I think we could use containingBlock rather than container here and then you
wouldn't need enclosingBox (since block is a box).

+        restrictedByLineClamp = !container()->style()->lineClamp().isNone();
     }
 
     if (hasOverflowClip() && !restrictedByLineClamp) {