Replace StyleRange with BreakList; update RenderText, etc.

ui/gfx/font_list.cc

 // Copyright (c) 2012 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 <stdlib.h>
 
 #include "base/logging.h"
 #include "base/string_number_conversions.h"
 #include "base/string_split.h"
 #include "base/string_util.h"
@@ skipping 10 matching lines @@
   DCHECK_GT(font_names->size(), 1U);
 
   // The last item is [STYLE_OPTIONS] SIZE.
   std::vector<std::string> styles_size;
   base::SplitString(font_names->back(), ' ', &styles_size);
   DCHECK(!styles_size.empty());
   base::StringToInt(styles_size.back(), font_size);
   DCHECK_GT(*font_size, 0);
   font_names->pop_back();
 
-  // Besides underline (which is supported through StyleRange), Font only
-  // supports BOLD and ITALIC, but not other styles.
+  // Font supports BOLD and ITALIC; underline is supported via RenderText.
   *font_style = 0;
   for (size_t i = 0; i < styles_size.size() - 1; ++i) {
     // Styles are separated by white spaces. base::SplitString splits styles
     // by space, and it inserts empty string for continuous spaces.
     if (styles_size[i].empty())
       continue;
     if (!styles_size[i].compare("Bold"))
       *font_style |= gfx::Font::BOLD;
     else if (!styles_size[i].compare("Italic"))
       *font_style |= gfx::Font::ITALIC;
@@ skipping 147 matching lines @@
       if (font_style == Font::NORMAL)
         fonts_.push_back(font);
       else
         fonts_.push_back(font.DeriveFont(0, font_style));
     }
   }
   return fonts_;
 }
 
 }  // namespace gfx