Moved SimplifyDocumentTitle from printing/backend

printing/backend/print_backend.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_BACKEND_PRINT_BACKEND_H_
 #define PRINTING_BACKEND_PRINT_BACKEND_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
-#include "base/strings/string16.h"
 #include "printing/print_job_constants.h"
 #include "printing/printing_export.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 // This is the interface for platform-specific code for a print backend
 namespace printing {
 
@@ skipping 67 matching lines @@
       const std::string& printer_name,
       PrinterCapsAndDefaults* printer_info) = 0;
 
   // Gets the information about driver for a specific printer.
   virtual std::string GetPrinterDriverInfo(
       const std::string& printer_name) = 0;
 
   // Returns true if printer_name points to a valid printer.
   virtual bool IsValidPrinter(const std::string& printer_name) = 0;
 
-  // Simplify title to resolve issue with some drivers.
-  static base::string16 SimplifyDocumentTitle(const base::string16& title);
-
   // Allocate a print backend. If |print_backend_settings| is NULL, default
   // settings will be used.
   // Return NULL if no print backend available.
   static scoped_refptr<PrintBackend> CreateInstance(
       const base::DictionaryValue* print_backend_settings);
 
  protected:
   friend class base::RefCountedThreadSafe<PrintBackend>;
   virtual ~PrintBackend();
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_BACKEND_PRINT_BACKEND_H_