Replace StyleRange with BreakList; update RenderText, etc.

ui/gfx/platform_font_pango.cc

Index: ui/gfx/platform_font_pango.cc
diff --git a/ui/gfx/platform_font_pango.cc b/ui/gfx/platform_font_pango.cc
index 6bb580be327cf095238240bd69bbe1616f0bedd7..3d2b98601e54df001f50367f78da4dc3262a1a04 100644
--- a/ui/gfx/platform_font_pango.cc
+++ b/ui/gfx/platform_font_pango.cc
@@ -240,8 +240,8 @@ NativeFont PlatformFontPango::GetNativeFont() const {
     case gfx::Font::ITALIC:
       pango_font_description_set_style(pfd, PANGO_STYLE_ITALIC);
       break;
-    case gfx::Font::UNDERLINED:
-      // TODO(deanm): How to do underlined?  Where do we use it?  Probably have
+    case gfx::Font::UNDERLINE:
+      // TODO(deanm): How to do underline?  Where do we use it?  Probably have
       // to paint it ourselves, see pango_font_metrics_get_underline_position.
       break;
   }