[LayoutNG] Initial support for multicol, introducing NGBlockBreakToken.

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

 // Copyright 2016 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_layout_input_node.h"
 
 #include "core/layout/ng/ng_block_layout_algorithm.h"
 #include "core/layout/ng/ng_block_node.h"
 #include "core/layout/ng/ng_constraint_space.h"
 #include "core/layout/ng/ng_inline_layout_algorithm.h"
@@ skipping 13 matching lines @@
   DCHECK(input_node->Type() == kLegacyBlock);
   NGBlockNode* block = toNGBlockNode(input_node);
   if (!block->CanUseNewLayout())
     return new NGLegacyBlockLayoutAlgorithm(block, constraint_space);
   const ComputedStyle* style = block->Style();
   if (block->HasInlineChildren()) {
     NGInlineNode* child = toNGInlineNode(block->FirstChild());
     return new NGInlineLayoutAlgorithm(style, child, constraint_space);
   }
   NGBlockNode* child = toNGBlockNode(block->FirstChild());
-  return new NGBlockLayoutAlgorithm(style, child, constraint_space);
+  // TODO(layout-ng): The break token should be passed as an argument to this
+  // method instead of getting it from the NGBlockNode
+  NGBreakToken* token = block->CurrentBreakToken();
+  return new NGBlockLayoutAlgorithm(style, child, constraint_space, token);
 }
 }