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

third_party/WebKit/Source/core/layout/ng/ng_constraint_space_builder.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_constraint_space_builder.h"
 
 #include "core/layout/ng/ng_length_utils.h"
 
 namespace blink {
 
 NGConstraintSpaceBuilder::NGConstraintSpaceBuilder(
     const NGConstraintSpace* parent_space)
     : available_size_(parent_space->AvailableSize()),
       percentage_resolution_size_(parent_space->PercentageResolutionSize()),
       initial_containing_block_size_(
           parent_space->InitialContainingBlockSize()),
       fragmentainer_space_available_(NGSizeIndefinite),
       parent_writing_mode_(parent_space->WritingMode()),
       is_fixed_size_inline_(false),
       is_fixed_size_block_(false),
       is_shrink_to_fit_(false),
       is_inline_direction_triggers_scrollbar_(false),
       is_block_direction_triggers_scrollbar_(false),
       fragmentation_type_(parent_space->BlockFragmentationType()),
       is_new_fc_(parent_space->IsNewFormattingContext()),
+      is_anonymous_(false),
       text_direction_(static_cast<unsigned>(parent_space->Direction())),
       bfc_offset_(parent_space->bfc_offset_),
       exclusions_(parent_space->Exclusions()) {}
 
 NGConstraintSpaceBuilder::NGConstraintSpaceBuilder(NGWritingMode writing_mode)
     : initial_containing_block_size_{NGSizeIndefinite, NGSizeIndefinite},
       fragmentainer_space_available_(NGSizeIndefinite),
       parent_writing_mode_(writing_mode),
       is_fixed_size_inline_(false),
       is_fixed_size_block_(false),
       is_shrink_to_fit_(false),
       is_inline_direction_triggers_scrollbar_(false),
       is_block_direction_triggers_scrollbar_(false),
       fragmentation_type_(kFragmentNone),
       is_new_fc_(false),
+      is_anonymous_(false),
       text_direction_(static_cast<unsigned>(TextDirection::kLtr)),
       exclusions_(new NGExclusions()) {}
 
 NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetAvailableSize(
     NGLogicalSize available_size) {
   available_size_ = available_size;
   return *this;
 }
 
 NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetPercentageResolutionSize(
@@ skipping 59 matching lines @@
   fragmentation_type_ = fragmentation_type;
   return *this;
 }
 
 NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetIsNewFormattingContext(
     bool is_new_fc) {
   is_new_fc_ = is_new_fc;
   return *this;
 }
 
+NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetIsAnonymous(
+    bool is_anonymous) {
+  is_anonymous_ = is_anonymous;
+  return *this;
+}
+
 NGConstraintSpace* NGConstraintSpaceBuilder::ToConstraintSpace(
     NGWritingMode out_writing_mode) {
   // Whether the child and the containing block are parallel to each other.
   // Example: vertical-rl and vertical-lr
   bool is_in_parallel_flow = IsParallelWritingMode(
       static_cast<NGWritingMode>(parent_writing_mode_), out_writing_mode);
 
   NGLogicalSize available_size = available_size_;
   NGLogicalSize percentage_resolution_size = percentage_resolution_size_;
   if (!is_in_parallel_flow) {
@@ skipping 32 matching lines @@
   if (is_in_parallel_flow) {
     return new NGConstraintSpace(
         static_cast<NGWritingMode>(out_writing_mode),
         static_cast<TextDirection>(text_direction_), available_size,
         percentage_resolution_size, initial_containing_block_size_,
         fragmentainer_space_available_, is_fixed_size_inline_,
         is_fixed_size_block_, is_shrink_to_fit_,
         is_inline_direction_triggers_scrollbar_,
         is_block_direction_triggers_scrollbar_,
         static_cast<NGFragmentationType>(fragmentation_type_), is_new_fc_,
-        margin_strut, bfc_offset, exclusions);
+        is_anonymous_, margin_strut, bfc_offset, exclusions);
   }
   return new NGConstraintSpace(
       out_writing_mode, static_cast<TextDirection>(text_direction_),
       available_size, percentage_resolution_size,
       initial_containing_block_size_, fragmentainer_space_available_,
       is_fixed_size_block_, is_fixed_size_inline_, is_shrink_to_fit_,
       is_block_direction_triggers_scrollbar_,
       is_inline_direction_triggers_scrollbar_,
       static_cast<NGFragmentationType>(fragmentation_type_), is_new_fc_,
-      margin_strut, bfc_offset, exclusions);
+      is_anonymous_, margin_strut, bfc_offset, exclusions);
 }
 
 }  // namespace blink