Get rid of AX_LINE_BREAKS attribute to improve performance.

content/browser/accessibility/browser_accessibility_win_unittest.cc

 // Copyright (c) 2012 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 "content/browser/accessibility/browser_accessibility_win.h"
 
 #include <stdint.h>
 
 #include <memory>
 
@@ skipping 326 matching lines @@
   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
   root.child_ids.push_back(2);
 
   ui::AXNodeData text_field;
   text_field.id = 2;
   text_field.role = ui::AX_ROLE_TEXT_FIELD;
   text_field.state = 1 << ui::AX_STATE_EDITABLE;
   text_field.SetValue(text_value);
   std::vector<int32_t> line_start_offsets;
   line_start_offsets.push_back(15);
-  text_field.AddIntListAttribute(
-      ui::AX_ATTR_LINE_BREAKS, line_start_offsets);
+  text_field.AddIntListAttribute(ui::AX_ATTR_CACHED_LINE_STARTS,
+                                 line_start_offsets);
   text_field.child_ids.push_back(3);
   text_field.child_ids.push_back(5);
   text_field.child_ids.push_back(6);
 
   ui::AXNodeData static_text1;
   static_text1.id = 3;
   static_text1.role = ui::AX_ROLE_STATIC_TEXT;
   static_text1.state = 1 << ui::AX_STATE_EDITABLE;
   static_text1.SetName(line1);
   static_text1.child_ids.push_back(4);
@@ skipping 2103 matching lines @@
   std::vector<AXEventNotificationDetails> events = {event};
   manager->OnAccessibilityEvents(events);
 
   EXPECT_HRESULT_SUCCEEDED(ax_child1->get_nRelations(&n_relations));
   EXPECT_EQ(2, n_relations);
   EXPECT_HRESULT_SUCCEEDED(ax_child2->get_nRelations(&n_relations));
   EXPECT_EQ(2, n_relations);
 }
 
 }  // namespace content