Get rid of AX_LINE_BREAKS attribute to improve performance.

ui/accessibility/ax_node_data.cc

 // Copyright 2013 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_node_data.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <set>
@@ skipping 674 matching lines @@
         break;
       case AX_ATTR_DESCRIBEDBY_IDS:
         result += " describedby_ids=" + IntVectorToString(values);
         break;
       case AX_ATTR_FLOWTO_IDS:
         result += " flowto_ids=" + IntVectorToString(values);
         break;
       case AX_ATTR_LABELLEDBY_IDS:
         result += " labelledby_ids=" + IntVectorToString(values);
         break;
-      case AX_ATTR_LINE_BREAKS:
-        result += " line_breaks=" + IntVectorToString(values);
-        break;
       case AX_ATTR_MARKER_TYPES: {
         std::string types_str;
         for (size_t i = 0; i < values.size(); ++i) {
           auto type = static_cast<AXMarkerType>(values[i]);
           if (type == AX_MARKER_TYPE_NONE)
             continue;
 
           if (i > 0)
             types_str += ',';
 
@@ skipping 20 matching lines @@
         break;
       case AX_ATTR_CELL_IDS:
         result += " cell_ids=" + IntVectorToString(values);
         break;
       case AX_ATTR_UNIQUE_CELL_IDS:
         result += " unique_cell_ids=" + IntVectorToString(values);
         break;
       case AX_ATTR_CHARACTER_OFFSETS:
         result += " character_offsets=" + IntVectorToString(values);
         break;
+      case AX_ATTR_CACHED_LINE_STARTS:
+        result += " cached_line_start_offsets=" + IntVectorToString(values);
+        break;
       case AX_ATTR_WORD_STARTS:
         result += " word_starts=" + IntVectorToString(values);
         break;
       case AX_ATTR_WORD_ENDS:
         result += " word_ends=" + IntVectorToString(values);
         break;
       case AX_INT_LIST_ATTRIBUTE_NONE:
         break;
     }
   }
 
   if (!child_ids.empty())
     result += " child_ids=" + IntVectorToString(child_ids);
 
   return result;
 }
 
 }  // namespace ui