[LayoutNG] Initial letter-spacing and word-spacing support

third_party/WebKit/Source/platform/text/TextRun.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2006, 2007, 2011 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 174 matching lines @@
 
   UChar32 CodepointAtAndNext(unsigned& i) const {
     SECURITY_DCHECK(i < len_);
     if (Is8Bit())
       return (*this)[i++];
     UChar32 codepoint;
     U16_NEXT(Characters16(), i, len_, codepoint);
     return codepoint;
   }
 
+  const void* Bytes() const { return data_.bytes_; }
+
   bool Is8Bit() const { return is8_bit_; }
   unsigned length() const { return len_; }
   unsigned CharactersLength() const { return characters_length_; }
 
   bool NormalizeSpace() const { return normalize_space_; }
   void SetNormalizeSpace(bool normalize_space) {
     normalize_space_ = normalize_space;
   }
 
   void SetText(const LChar* c, unsigned len) {
@@ skipping 58 matching lines @@
 
   // Up-converts to UTF-16 as needed and normalizes spaces and Unicode control
   // characters as per the CSS Text Module Level 3 specification.
   // https://drafts.csswg.org/css-text-3/#white-space-processing
   std::unique_ptr<UChar[]> NormalizedUTF16(unsigned* result_length) const;
 
  private:
   union {
     const LChar* characters8;
     const UChar* characters16;
+    const void* bytes_;
   } data_;
   // Marks the end of the characters buffer.  Default equals to m_len.
   unsigned characters_length_;
   unsigned len_;
 
   // m_xpos is the x position relative to the left start of the text line, not
   // relative to the left start of the containing block. In the case of right
   // alignment or center alignment, left start of the text line is not the same
   // as left start of the containing block.
   float xpos_;
@@ skipping 26 matching lines @@
       : run(r), from(0), to(r.length()) {}
 
   const TextRun& run;
   unsigned from;
   unsigned to;
   FloatRect bounds;
 };
 
 }  // namespace blink
 #endif