adding baseline options for super/sub scripting

ui/gfx/render_text_harfbuzz.h

 // Copyright 2014 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 UI_GFX_RENDER_TEXT_HARFBUZZ_H_
 #define UI_GFX_RENDER_TEXT_HARFBUZZ_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "third_party/harfbuzz-ng/src/hb.h"
@@ skipping 52 matching lines @@
 
   scoped_ptr<uint16[]> glyphs;
   scoped_ptr<SkPoint[]> positions;
   std::vector<uint32> glyph_to_char;
   size_t glyph_count;
 
   std::string family;
   skia::RefPtr<SkTypeface> skia_face;
   FontRenderParams render_params;
   int font_size;
+  int baseline_offset;
+  int baseline_type;
   int font_style;
   bool strike;
   bool diagonal_strike;
   bool underline;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TextRunHarfBuzz);
 };
 
 // Manages the list of TextRunHarfBuzz and its logical <-> visual index mapping.
@@ skipping 180 matching lines @@
 
   // Fixed width of glyphs. This should only be set in test environments.
   float glyph_width_for_test_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderTextHarfBuzz);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_RENDER_TEXT_HARFBUZZ_H_