Moved SimplifyDocumentTitle from printing/backend

printing/backend/print_backend.cc

 // 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.
 
 #include "printing/backend/print_backend.h"
 
-#include <algorithm>
-
-#include "third_party/icu/source/common/unicode/uchar.h"
-#include "ui/gfx/text_elider.h"
-
-const int kMaxDocumentTitleLength = 50;
-
 namespace printing {
 
 PrinterBasicInfo::PrinterBasicInfo()
     : printer_status(0),
       is_default(false) {}
 
 PrinterBasicInfo::~PrinterBasicInfo() {}
 
 PrinterSemanticCapsAndDefaults::PrinterSemanticCapsAndDefaults()
     : color_changeable(false),
       duplex_capable(false),
       color_default(false),
       duplex_default(UNKNOWN_DUPLEX_MODE) {}
 
 PrinterSemanticCapsAndDefaults::~PrinterSemanticCapsAndDefaults() {}
 
 PrinterCapsAndDefaults::PrinterCapsAndDefaults() {}
 
 PrinterCapsAndDefaults::~PrinterCapsAndDefaults() {}
 
 PrintBackend::~PrintBackend() {}
 
-base::string16 PrintBackend::SimplifyDocumentTitle(
-    const base::string16& title) {
-  base::string16 no_controls(title);
-  no_controls.erase(
-    std::remove_if(no_controls.begin(), no_controls.end(), &u_iscntrl),
-    no_controls.end());
-  base::string16 result;
-  gfx::ElideString(no_controls, kMaxDocumentTitleLength, &result);
-  return result;
-}
-
 }  // namespace printing