Get rid of AX_LINE_BREAKS attribute to improve performance.

ui/accessibility/ax_node_data.cc

Index: ui/accessibility/ax_node_data.cc
diff --git a/ui/accessibility/ax_node_data.cc b/ui/accessibility/ax_node_data.cc
index 0f04517978c944131f8cce87eaa8c12cb85f763c..72180ab4f85194fb06cab403333690c7442c9e82 100644
--- a/ui/accessibility/ax_node_data.cc
+++ b/ui/accessibility/ax_node_data.cc
@@ -692,9 +692,6 @@ std::string AXNodeData::ToString() const {
       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) {