Fix up extension badge text drawing....

app/gfx/font_mac.mm

 // Copyright (c) 2009 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 "app/gfx/font.h"
 
 #include <Cocoa/Cocoa.h>
 
 #include "base/logging.h"
 #include "base/sys_string_conversions.h"
@@ skipping 53 matching lines @@
 }
 
 int Font::GetExpectedTextWidth(int length) const {
   return length * avg_width_;
 }
 
 int Font::style() const {
   return style_;
 }
 
-std::wstring Font::FontName() {
+const std::wstring& Font::FontName() const {
   return font_name_;
 }
 
 int Font::FontSize() {
   return font_size_;
 }
 
 NativeFont Font::nativeFont() const {
   // TODO(pinkerton): apply |style_| to font.
   // We could cache this, but then we'd have to conditionally change the
   // dtor just for MacOS. Not sure if we want to/need to do that.
   return [NSFont fontWithName:base::SysWideToNSString(font_name_)
                          size:font_size_];
 }
 
 }  // namespace gfx