[LayoutNG] Add NGLineBoxFragment

third_party/WebKit/Source/core/layout/ng/ng_physical_line_box_fragment.cc

Index: third_party/WebKit/Source/core/layout/ng/ng_physical_line_box_fragment.cc
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_physical_line_box_fragment.cc b/third_party/WebKit/Source/core/layout/ng/ng_physical_line_box_fragment.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f0c014423930523cb4c0d42c96f602387e9efd6b
--- /dev/null
+++ b/third_party/WebKit/Source/core/layout/ng/ng_physical_line_box_fragment.cc
@@ -0,0 +1,24 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "core/layout/ng/ng_physical_line_box_fragment.h"
+
+#include "core/layout/ng/ng_floating_object.h"
+
+namespace blink {
+
+NGPhysicalLineBoxFragment::NGPhysicalLineBoxFragment(
+    NGPhysicalSize size,
+    Vector<RefPtr<NGPhysicalFragment>>& children,
+    const NGLineHeightMetrics& metrics,
+    RefPtr<NGBreakToken> break_token)
+    : NGPhysicalFragment(nullptr,
+                         size,
+                         kFragmentLineBox,
+                         std::move(break_token)),
+      metrics_(metrics) {
+  children_.swap(children);
+}
+
+}  // namespace blink