[LayoutNG] Allow block-flow layout to be fragmented using new approach.

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

Index: third_party/WebKit/Source/core/layout/ng/ng_block_node.cc
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_block_node.cc b/third_party/WebKit/Source/core/layout/ng/ng_block_node.cc
index 0d365228ab5da6a1ed7311aac8cb83b1866d7882..973b5724b60a0e95ca4c9b331c2272baa7dba912 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_block_node.cc
+++ b/third_party/WebKit/Source/core/layout/ng/ng_block_node.cc
@@ -77,8 +77,8 @@ NGBlockNode::NGBlockNode(ComputedStyle* style)
 // included from a compilation unit that lacks the ComputedStyle definition.
 NGBlockNode::~NGBlockNode() {}
 
-RefPtr<NGLayoutResult> NGBlockNode::Layout(
-    NGConstraintSpace* constraint_space) {
+RefPtr<NGLayoutResult> NGBlockNode::Layout(NGConstraintSpace* constraint_space,
+                                           NGBreakToken* break_token) {
   // Use the old layout code and synthesize a fragment.
   if (!CanUseNewLayout()) {
     DCHECK(layout_box_);
@@ -86,9 +86,9 @@ RefPtr<NGLayoutResult> NGBlockNode::Layout(
     return layout_result_;
   }
 
-  layout_result_ =
-      NGBlockLayoutAlgorithm(this, constraint_space, CurrentBreakToken())
-          .Layout();
+  layout_result_ = NGBlockLayoutAlgorithm(this, constraint_space,
+                                          toNGBlockBreakToken(break_token))
+                       .Layout();
 
   CopyFragmentDataToLayoutBox(*constraint_space);
   return layout_result_;
@@ -127,7 +127,8 @@ MinAndMaxContentSizes NGBlockNode::ComputeMinAndMaxContentSizes() {
     return *maybe_sizes;
 
   // Have to synthesize this value.
-  RefPtr<NGLayoutResult> layout_result = Layout(constraint_space);
+  RefPtr<NGLayoutResult> layout_result =
+      Layout(constraint_space, /* break_token */ nullptr);
   NGPhysicalFragment* physical_fragment =
       layout_result->PhysicalFragment().get();
   NGBoxFragment min_fragment(FromPlatformWritingMode(Style().getWritingMode()),
@@ -143,7 +144,7 @@ MinAndMaxContentSizes NGBlockNode::ComputeMinAndMaxContentSizes() {
           .SetPercentageResolutionSize({LayoutUnit(), LayoutUnit()})
           .ToConstraintSpace(FromPlatformWritingMode(Style().getWritingMode()));
 
-  layout_result = Layout(constraint_space);
+  layout_result = Layout(constraint_space, /* break_token */ nullptr);
   physical_fragment = layout_result->PhysicalFragment().get();
   NGBoxFragment max_fragment(FromPlatformWritingMode(Style().getWritingMode()),
                              toNGPhysicalBoxFragment(physical_fragment));