TextBreakIterator should use the C++ icu API instead of the C one

Source/core/editing/TextCheckingHelper.cpp

 /*
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 55 matching lines @@
         checkLocation += (badGrammarLocation + badGrammarLength);
         checkLength -= (badGrammarLocation + badGrammarLength);
     }
 }
 
 static void findMisspellings(TextCheckerClient& client, const UChar* text, int start, int length, Vector<TextCheckingResult>& results)
 {
     TextBreakIterator* iterator = wordBreakIterator(text + start, length);
     if (!iterator)
         return;
-    int wordStart = textBreakCurrent(iterator);
+    int wordStart = iterator->current();
     while (0 <= wordStart) {
-        int wordEnd = textBreakNext(iterator);
+        int wordEnd = iterator->current();

[leviw_travelin_and_unemployed, 2013/09/17 21:53:39]

It seems strange to me that these 2 lines are the same now.

         if (wordEnd < 0)
             break;
         int wordLength = wordEnd - wordStart;
         int misspellingLocation = -1;
         int misspellingLength = 0;
         client.checkSpellingOfString(String(text + start + wordStart, wordLength), &misspellingLocation, &misspellingLength);
         if (0 < misspellingLength) {
             ASSERT(0 <= misspellingLocation && misspellingLocation <= wordLength);
             ASSERT(0 < misspellingLength && misspellingLocation + misspellingLength <= wordLength);
             TextCheckingResult misspelling;
@@ skipping 479 matching lines @@
         return false;
 
     const Settings* settings = frame->settings();
     if (!settings)
         return false;
 
     return settings->unifiedTextCheckerEnabled();
 }
 
 }