Fix some nits from r447440.

printing/print_settings.h

 // 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.
 
 #ifndef PRINTING_PRINT_SETTINGS_H_
 #define PRINTING_PRINT_SETTINGS_H_
 
 #include <string>
 
 #include "base/strings/string16.h"
@@ skipping 13 matching lines @@
 PRINTING_EXPORT void GetColorModelForMode(int color_mode,
                                           std::string* color_setting_name,
                                           std::string* color_value);
 #endif
 
 // Inform the printing system that it may embed this user-agent string
 // in its output's metadata.
 PRINTING_EXPORT void SetAgent(const std::string& user_agent);
 PRINTING_EXPORT const std::string& GetAgent();
 
-// OS-independent print settings.
 class PRINTING_EXPORT PrintSettings {
  public:
 #if defined(OS_WIN)
   enum PrinterType {
     TYPE_NONE = 0,
     TYPE_XPS,
     TYPE_POSTSCRIPT_LEVEL2,
     TYPE_POSTSCRIPT_LEVEL3
   };
 #endif
@@ skipping 201 matching lines @@
   PrinterType printer_type_;
 #endif
 
   // If margin type is custom, this is what was requested.
   PageMargins requested_custom_margins_in_points_;
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PRINT_SETTINGS_H_