[LayoutNG] Inline margin/border/padding, inter-item breaking, and tests

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

Index: third_party/WebKit/Source/core/layout/ng/ng_length_utils.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_length_utils.h b/third_party/WebKit/Source/core/layout/ng/ng_length_utils.h
index 1b456e5994afcf12e3abc7d3560d062173954ef1..994c9a919e50b7891a50251676d1529d08215381 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_length_utils.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_length_utils.h
@@ -111,6 +111,14 @@ CORE_EXPORT NGBoxStrut ComputeBorders(const NGConstraintSpace& constraint_space,
 CORE_EXPORT NGBoxStrut ComputePadding(const NGConstraintSpace&,
                                       const ComputedStyle&);
 
+CORE_EXPORT LayoutUnit
+ComputeMarginBorderPaddingInlineStart(const NGConstraintSpace&,
+                                      const ComputedStyle&);
+
+CORE_EXPORT LayoutUnit
+ComputeMarginBorderPaddingInlineEnd(const NGConstraintSpace&,
+                                    const ComputedStyle&);
+
 // Resolves margin: auto in the inline direction.
 // This uses the available size from the constraint space and inline size to
 // compute the margins that are auto, if any, and adjusts