[LayoutNG] Handle border and padding when sizing a block and when placing its children.

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 ee849bb8601aca97f0cb9ddc7706b216dacca5ba..2847bc64fce4226a472607a50132651a971c5668 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
@@ -49,6 +49,18 @@ CORE_EXPORT LayoutUnit computeBlockSizeForFragment(const NGConstraintSpace&,
                                                    const ComputedStyle&,
                                                    LayoutUnit contentSize);
 
+CORE_EXPORT LayoutUnit computeBorderAndPaddingBefore(const NGConstraintSpace&,
+                                                     const ComputedStyle&);
+
+CORE_EXPORT LayoutUnit computeBorderAndPaddingAfter(const NGConstraintSpace&,
+                                                    const ComputedStyle&);
+
+CORE_EXPORT LayoutUnit computeBorderAndPaddingStart(const NGConstraintSpace&,
+                                                    const ComputedStyle&);
+
+CORE_EXPORT LayoutUnit computeBorderAndPaddingEnd(const NGConstraintSpace&,
+                                                  const ComputedStyle&);
+
 CORE_EXPORT NGBoxStrut computeMargins(const NGConstraintSpace&,
                                       const ComputedStyle&);