Simplify document title for Windows printing.

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/public/common/unicode/uchar.h"
+#include "ui/base/text/text_elider.h"
+
+namespace {
+
+const wchar_t kDefaultDocumentTitle[] = L"Untitled Document";
+const int kMaxDocumentTitleLength = 25;
+
+}  // namespace
+
 namespace printing {
 
 PrinterBasicInfo::PrinterBasicInfo()
     : printer_status(0),
       is_default(false) {}
 
 PrinterBasicInfo::~PrinterBasicInfo() {}
 
 PrinterSemanticCapsAndDefaults::PrinterSemanticCapsAndDefaults()
     : color_capable(false),
       duplex_capable(false),
       color_default(false),
       duplex_default(UNKNOWN_DUPLEX_MODE) {}
 
 PrinterSemanticCapsAndDefaults::~PrinterSemanticCapsAndDefaults() {}
 
 PrinterCapsAndDefaults::PrinterCapsAndDefaults() {}
 
 PrinterCapsAndDefaults::~PrinterCapsAndDefaults() {}
 
 PrintBackend::~PrintBackend() {}
 
+string16 PrintBackend::SimplifyDocumentTitle(const string16& title) {
+  string16 no_controls(title);
+  no_controls.erase(
+    std::remove_if(no_controls.begin(), no_controls.end(), &u_iscntrl),
+    no_controls.end());
+  string16 result;
+  ui::ElideString(no_controls, kMaxDocumentTitleLength, &result);
+  return result;
+}
+
 }  // namespace printing