Ignore zero-height fragments during margin collapsing

third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm.h

Index: third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm.h b/third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm.h
index e4d1d5f1b60c7867fed493f351050988b2368cad..a471b5a2fd702b6cf9b4212ab497c1575775ef7b 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm.h
@@ -52,11 +52,11 @@ class CORE_EXPORT NGBlockLayoutAlgorithm : public NGLayoutAlgorithm {
   //
   // @param space Constraint space for the block.
   // @param child_margins Margins information for the current child.
-  // @param children_margin_strut MarginStrut for children of the current child.
+  // @param fragment Children's fragment.

[ikilpatrick, 2016/09/19 17:04:19]

Child fragment or Current child fragment? 

[Gleb Lanbin, 2016/09/19 17:39:52]

Done.

   // @return Margin block start based on collapsed margins result.
   LayoutUnit CollapseMargins(const NGConstraintSpace& space,
                              const NGBoxStrut& child_margins,
-                             const NGMarginStrut& children_margin_strut);
+                             const NGFragment& fragment);
 
   RefPtr<const ComputedStyle> style_;
   Member<NGBox> first_child_;