[css-grid] Fix indefinite height detection

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 06152bea1a748b6d3f5d32ed05d27f387d798166..f36d6e4796f8698373e504e28c48160fb7c4a633 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBox.h
+++ b/third_party/WebKit/Source/core/layout/LayoutBox.h
@@ -202,7 +202,6 @@ public:
 
     // Use this with caution! No type checking is done!
     LayoutBox* firstChildBox() const;
-    LayoutBox* firstInFlowChildBox() const;
     LayoutBox* lastChildBox() const;
 
     int pixelSnappedWidth() const { return m_frameRect.pixelSnappedWidth(); }
@@ -1175,14 +1174,6 @@ inline LayoutBox* LayoutBox::firstChildBox() const
     return toLayoutBox(slowFirstChild());
 }
 
-inline LayoutBox* LayoutBox::firstInFlowChildBox() const
-{
-    LayoutBox* child = firstChildBox();
-    while (child && child->isOutOfFlowPositioned())
-        child = child->nextSiblingBox();
-    return child;
-}
-
 inline LayoutBox* LayoutBox::lastChildBox() const
 {
     return toLayoutBox(slowLastChild());