Replace WTF::emptyString{16Bit}() with a static global

third_party/WebKit/Source/platform/text/LocaleICU.cpp

 /*
  * Copyright (C) 2011,2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 148 matching lines @@
   UDateFormat* formatter =
       udat_open(UDAT_PATTERN, UDAT_PATTERN, m_locale.data(), 0, -1,
                 monthPattern, isShort ? 3 : 4, &status);
   udat_setContext(formatter, UDISPCTX_CAPITALIZATION_FOR_STANDALONE, &status);
   ASSERT(U_SUCCESS(status));
   return formatter;
 }
 
 static String getDateFormatPattern(const UDateFormat* dateFormat) {
   if (!dateFormat)
-    return emptyString();
+    return emptyString;
 
   UErrorCode status = U_ZERO_ERROR;
   int32_t length = udat_toPattern(dateFormat, TRUE, 0, 0, &status);
   if (status != U_BUFFER_OVERFLOW_ERROR || !length)
-    return emptyString();
+    return emptyString;
   StringBuffer<UChar> buffer(length);
   status = U_ZERO_ERROR;
   udat_toPattern(dateFormat, TRUE, buffer.characters(), length, &status);
   if (U_FAILURE(status))
-    return emptyString();
+    return emptyString;
   return String::adopt(buffer);
 }
 
 std::unique_ptr<Vector<String>> LocaleICU::createLabelVector(
     const UDateFormat* dateFormat,
     UDateFormatSymbolType type,
     int32_t startIndex,
     int32_t size) {
   if (!dateFormat)
     return std::unique_ptr<Vector<String>>();
@@ skipping 261 matching lines @@
   m_shortStandAloneMonthLabels = shortMonthLabels();
   return m_shortStandAloneMonthLabels;
 }
 
 const Vector<String>& LocaleICU::timeAMPMLabels() {
   initializeDateTimeFormat();
   return m_timeAMPMLabels;
 }
 
 }  // namespace blink