Add printing.dll to the component build.

printing/print_settings_initializer.h

 // Copyright (c) 2011 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_INITIALIZER_H_
 #define PRINTING_PRINT_SETTINGS_INITIALIZER_H_
 
 #include "base/basictypes.h"
 #include "base/logging.h"
+#include "printing/printing_export.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace printing {
 
 class PrintSettings;
 
 // Initializes the header footer strings in the PrintSettings object from the
 // provided |job_settings|.
-class PrintSettingsInitializer {
+class PRINTING_EXPORT PrintSettingsInitializer {
  public:
   static void InitHeaderFooterStrings(
       const base::DictionaryValue& job_settings,
       PrintSettings* print_settings);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PrintSettingsInitializer);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PRINT_SETTINGS_INITIALIZER_H_