Add Pepper TrueType font API call to enumerate fonts in a given family.

content/renderer/pepper/pepper_truetype_font_win.cc

Index: content/renderer/pepper/pepper_truetype_font_win.cc
diff --git a/content/renderer/pepper/pepper_truetype_font_win.cc b/content/renderer/pepper/pepper_truetype_font_win.cc
index 2e24d7c17d1e7115c7cb6dbe0ec6ea478a25432b..ea6a1e9efad63d9de18e079f8fc6409aae1de2f4 100644
--- a/content/renderer/pepper/pepper_truetype_font_win.cc
+++ b/content/renderer/pepper/pepper_truetype_font_win.cc
@@ -113,7 +113,7 @@ int32_t PepperTrueTypeFontWin::Describe(
   desc->style = font_desc.lfItalic ? PP_TRUETYPEFONTSTYLE_ITALIC :
                                      PP_TRUETYPEFONTSTYLE_NORMAL;
   desc->weight = static_cast<PP_TrueTypeFontWeight_Dev>(font_desc.lfWeight);
-  desc->width = PP_TRUETYPEFONTWIDTH_NORMAL;
+  desc->width = PP_TRUETYPEFONTWIDTH_NORMAL;  // TODO(bbudge) support widths.
   desc->charset =
       static_cast<PP_TrueTypeFontCharset_Dev>(font_desc.lfCharSet);