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:

[dmazzoni, 2016/09/13 17:29:38]

I'd prefer if AXNodeData dumped the new cached attribute too, just so when we do
dump it we really do see the whole structure. It could call it cachedLineBreaks=

-        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 38 matching lines @@
     }
   }
 
   if (!child_ids.empty())
     result += " child_ids=" + IntVectorToString(child_ids);
 
   return result;
 }
 
 }  // namespace ui