Prepare Chromium and Blink for ICU 59

base/i18n/unicodestring.h

Index: base/i18n/unicodestring.h
diff --git a/base/i18n/unicodestring.h b/base/i18n/unicodestring.h
new file mode 100644
index 0000000000000000000000000000000000000000..b62c5264deb452b4033702f44eefecba12ca8006
--- /dev/null
+++ b/base/i18n/unicodestring.h
@@ -0,0 +1,32 @@
+// Copyright (c) 2017 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 BASE_I18N_UNICODESTRING_H_
+#define BASE_I18N_UNICODESTRING_H_
+
+#include "base/strings/string16.h"
+#include "third_party/icu/source/common/unicode/unistr.h"
+#include "third_party/icu/source/common/unicode/uvernum.h"
+
+#if U_ICU_VERSION_MAJOR_NUM >= 59
+#include "third_party/icu/source/common/unicode/char16ptr.h"
+#endif
+
+namespace base {
+namespace i18n {
+
+inline string16 UnicodeStringToString16(const icu::UnicodeString& unistr) {
+#if U_ICU_VERSION_MAJOR_NUM >= 59
+  return base::string16(icu::toUCharPtr(unistr.getBuffer()),
+                        static_cast<size_t>(unistr.length()));
+#else
+  return base::string16(unistr.getBuffer(),
+                        static_cast<size_t>(unistr.length()));
+#endif
+}
+
+}  // namespace i18n
+}  // namespace base
+
+#endif  // BASE_UNICODESTRING_H_