Move more string_util functions to base namespace.

ui/accessibility/ax_text_utils.cc

 // Copyright (c) 2011 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 "ui/accessibility/ax_text_utils.h"
 
 #include "base/logging.h"
 #include "base/strings/string_util.h"
 
 namespace ui {
@@ skipping 44 matching lines @@
         return 0;
       pos = result - 1;
     }
 
     switch (boundary) {
       case CHAR_BOUNDARY:
       case LINE_BOUNDARY:
         NOTREACHED();  // These are handled above.
         break;
       case WORD_BOUNDARY:
-        if (IsWhitespace(text[pos]))
+        if (base::IsUnicodeWhitespace(text[pos]))
           return result;
         break;
       case PARAGRAPH_BOUNDARY:
         if (text[pos] == '\n')
           return result;
         break;
       case SENTENCE_BOUNDARY:
         if ((text[pos] == '.' || text[pos] == '!' || text[pos] == '?') &&
-            (pos == text_size - 1 || IsWhitespace(text[pos + 1]))) {
+            (pos == text_size - 1 ||
+             base::IsUnicodeWhitespace(text[pos + 1]))) {
           return result;
         }
         break;
       case ALL_BOUNDARY:
       default:
         break;
     }
 
     if (direction == FORWARDS_DIRECTION) {
       result++;
     } else {
       result--;
     }
   }
 }
 
 }  // Namespace ui