Moved SimplifyDocumentTitle from printing/backend

printing/printing_utils.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_PRINTING_UTILS_H_
+#define PRINTING_PRINTING_UTILS_H_
+
+#include "base/strings/string16.h"
+#include "printing/printing_export.h"
+
+namespace printing {
+
+// Simplify title to resolve issue with some drivers.
+PRINTING_EXPORT base::string16 SimplifyDocumentTitle(
+    const base::string16& title);
+
+}  // namespace printing
+
+#endif  // PRINTING_PRINTING_UTILS_H_