Add ascii() / latin1() / utf8() methods to AtomicString to avoid having to call string()

Source/platform/text/TextBreakIteratorICU.cpp

 /*
  * Copyright (C) 2006 Lars Knoll <lars@trolltech.com>
  * Copyright (C) 2007, 2011, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 45 matching lines @@
             if (m_pool[i].first == locale) {
                 iterator = m_pool[i].second;
                 m_pool.remove(i);
                 break;
             }
         }
 
         if (!iterator) {
             UErrorCode openStatus = U_ZERO_ERROR;
             bool localeIsEmpty = locale.isEmpty();
-            iterator = icu::BreakIterator::createLineInstance(localeIsEmpty ? icu::Locale(currentTextBreakLocaleID()) : icu::Locale(locale.string().utf8().data()), openStatus);
+            iterator = icu::BreakIterator::createLineInstance(localeIsEmpty ? icu::Locale(currentTextBreakLocaleID()) : icu::Locale(locale.utf8().data()), openStatus);
             // locale comes from a web page and it can be invalid, leading ICU
             // to fail, in which case we fall back to the default locale.
             if (!localeIsEmpty && U_FAILURE(openStatus)) {
                 openStatus = U_ZERO_ERROR;
                 iterator = icu::BreakIterator::createLineInstance(icu::Locale(currentTextBreakLocaleID()), openStatus);
             }
 
             if (U_FAILURE(openStatus)) {
                 WTF_LOG_ERROR("icu::BreakIterator construction failed with status %d", openStatus);
                 return 0;
@@ skipping 760 matching lines @@
         "$Tel1 $TelV $Tel0;"               // Telugu Virama (backward)
         "$Kan1 $KanV $Kan0;"               // Kannada Virama (backward)
         "$Mal1 $MalV $Mal0;"               // Malayalam Virama (backward)
         "!!safe_reverse;"
         "!!safe_forward;";
 
     return setUpIteratorWithRules(kRules, string, length);
 }
 
 }