Fix up extension badge text drawing....

app/gfx/font_win.cc

Index: app/gfx/font_win.cc
===================================================================
--- app/gfx/font_win.cc	(revision 30614)
+++ app/gfx/font_win.cc	(working copy)
@@ -111,10 +111,8 @@
   return base_font_ref_;
 }
 
-std::wstring Font::FontName() {
-  LOGFONT font_info;
-  GetObject(hfont(), sizeof(LOGFONT), &font_info);
-  return (std::wstring(font_info.lfFaceName));
+const std::wstring& Font::FontName() const {
+  return font_name();
 }
 
 int Font::FontSize() {
@@ -145,6 +143,10 @@
       style_(style),
       dlu_base_x_(dlu_base_x) {
   DLOG_ASSERT(hfont);
+
+  LOGFONT font_info;
+  GetObject(hfont(), sizeof(LOGFONT), &font_info);
+  font_name_ = std::wstring(font_info.lfFaceName);
 }
 
 Font::HFontRef::~HFontRef() {