[layoutng] Margin support, part 1

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 a42f1dae0656b6ccf159c8a52784dbffc78d4087..cf5615bed5b4f778d597fbad738a81ee15d868a7 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
@@ -12,8 +12,9 @@ class ComputedStyle;
 class LayoutUnit;
 class Length;
 class NGConstraintSpace;
+struct NGBoxMargins;
 
-enum class LengthResolveType { MinSize, MaxSize, ContentSize };
+enum class LengthResolveType { MinSize, MaxSize, ContentSize, MarginSize };
 
 // Convert an inline-axis length to a layout unit using the given constraint
 // space.
@@ -38,9 +39,12 @@ CORE_EXPORT LayoutUnit computeInlineSizeForFragment(const NGConstraintSpace&,
 // logical height and max logical height properties from the ComputedStyle
 // object.
 CORE_EXPORT LayoutUnit computeBlockSizeForFragment(const NGConstraintSpace&,
-                                                   const ComputedStyle& style,
+                                                   const ComputedStyle&,
                                                    LayoutUnit contentSize);
 
+CORE_EXPORT NGBoxMargins computeMargins(const NGConstraintSpace&,
+                                        const ComputedStyle&);
+
 }  // namespace blink
 
 #endif  // NGLengthUtils_h