[LayoutNG] Add NGInlineBreakToken and back of NGInlineLayoutAlgorithm

third_party/WebKit/Source/core/layout/ng/ng_block_break_token.h

 // 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.
 
 #ifndef NGBlockBreakToken_h
 #define NGBlockBreakToken_h
 
 #include "core/CoreExport.h"
 #include "core/layout/ng/ng_break_token.h"
 #include "platform/LayoutUnit.h"
 
 namespace blink {
 
 class NGBlockNode;
 
 // Represents a break token for a block node.
 class CORE_EXPORT NGBlockBreakToken : public NGBreakToken {
  public:
   // Creates a break token for a node which did fragment, and can potentially
   // produce more fragments.
   //
   // The NGBlockBreakToken takes ownership of child_break_tokens, leaving it
   // empty for the caller.
+  //
+  // The node is NGBlockNode, or any other NGLayoutInputNode that produces
+  // anonymous box.
   static RefPtr<NGBlockBreakToken> create(
-      NGBlockNode* node,
+      NGLayoutInputNode* node,
       LayoutUnit used_block_size,
       Vector<RefPtr<NGBreakToken>>& child_break_tokens) {
     return adoptRef(
         new NGBlockBreakToken(node, used_block_size, child_break_tokens));
   }
 
   // Creates a break token for a node which cannot produce any more fragments.
   static RefPtr<NGBlockBreakToken> create(NGLayoutInputNode* node) {
     return adoptRef(new NGBlockBreakToken(node));
   }
@@ skipping 11 matching lines @@
   // has an associated break token. This may be either finished (we should skip
   // this child) or unfinished (we should try and produce the next fragment for
   // this child).
   //
   // A child which we haven't visited yet doesn't have a break token here.
   const Vector<RefPtr<NGBreakToken>>& ChildBreakTokens() const {
     return child_break_tokens_;
   }
 
  private:
-  NGBlockBreakToken(NGBlockNode* node,
+  NGBlockBreakToken(NGLayoutInputNode* node,
                     LayoutUnit used_block_size,
                     Vector<RefPtr<NGBreakToken>>& child_break_tokens);
 
   explicit NGBlockBreakToken(NGLayoutInputNode* node);
 
   LayoutUnit used_block_size_;
   Vector<RefPtr<NGBreakToken>> child_break_tokens_;
 };
 
 DEFINE_TYPE_CASTS(NGBlockBreakToken,
                   NGBreakToken,
                   token,
                   token->Type() == NGBreakToken::kBlockBreakToken,
                   token.Type() == NGBreakToken::kBlockBreakToken);
 
 }  // namespace blink
 
 #endif  // NGBlockBreakToken_h