Moved SimplifyDocumentTitle from printing/backend

printing/printing_utils.cc

+// Copyright 2013 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/printing_utils.h"
+
+#include <algorithm>
+
+#include "third_party/icu/source/common/unicode/uchar.h"
+#include "ui/gfx/text_elider.h"
+
+namespace {
+const int kMaxDocumentTitleLength = 50;
+}
+
+namespace printing {
+
+base::string16 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