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

third_party/WebKit/Source/core/layout/ng/inline/ng_inline_item.cc

Index: third_party/WebKit/Source/core/layout/ng/inline/ng_inline_item.cc
diff --git a/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_item.cc b/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_item.cc
index 61a5e31a44e2df3f67200a3dd06c578ad7ba11b3..6db6e7004a781089eba567db8a89c7cb4e613996 100644
--- a/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_item.cc
+++ b/third_party/WebKit/Source/core/layout/ng/inline/ng_inline_item.cc
@@ -4,6 +4,7 @@
 
 #include "core/layout/ng/inline/ng_inline_item.h"
 
+#include "core/layout/LayoutInline.h"
 #include "core/layout/LayoutObject.h"
 #include "platform/fonts/CharacterRange.h"
 #include "platform/fonts/shaping/ShapeResultBuffer.h"
@@ -123,6 +124,18 @@ void NGInlineItem::GetFallbackFonts(
   shape_result_->FallbackFonts(fallback_fonts);
 }
 
+bool NGInlineItem::HasStartEdge() const {
+  DCHECK(Type() == kOpenTag || Type() == kCloseTag);
+  // TODO(kojii): Should use break token when NG has its own tree building.
+  return !GetLayoutObject()->IsInlineElementContinuation();
+}
+
+bool NGInlineItem::HasEndEdge() const {
+  DCHECK(Type() == kOpenTag || Type() == kCloseTag);
+  // TODO(kojii): Should use break token when NG has its own tree building.
+  return !ToLayoutInline(GetLayoutObject())->Continuation();
+}
+
 NGInlineItemRange::NGInlineItemRange(Vector<NGInlineItem>* items,
                                      unsigned start_index,
                                      unsigned end_index)