Use text affinity to return correct accessible line boundaries.

components/test_runner/web_ax_object_proxy.h

 // Copyright 2014 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.
 
 #ifndef COMPONENTS_TEST_RUNNER_WEB_AX_OBJECT_PROXY_H_
 #define COMPONENTS_TEST_RUNNER_WEB_AX_OBJECT_PROXY_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 58 matching lines @@
   int IntValue();
   int MinValue();
   int MaxValue();
   std::string ValueDescription();
   int ChildrenCount();
 
   // The following selection functions return global information about the
   // current selection and can be called on any object in the tree.
   v8::Local<v8::Value> SelectionAnchorObject();
   int SelectionAnchorOffset();
+  std::string SelectionAnchorAffinity();
   v8::Local<v8::Value> SelectionFocusObject();
   int SelectionFocusOffset();
+  std::string SelectionFocusAffinity();
 
   // The following selection functions return text offsets calculated starting
   // at this object. They only report on a selection that is placed on the
   // current object or on any of its descendants.
   // For example, they can be used to retrieve the selection in an input or
   // a textarea.
   int SelectionStart();
   int SelectionEnd();
   int SelectionStartLineNumber();
   int SelectionEndLineNumber();
@@ skipping 128 matching lines @@
   v8::Local<v8::Object> GetOrCreate(const blink::WebAXObject&) override;
 
  private:
   typedef v8::PersistentValueVector<v8::Object> ElementList;
   ElementList elements_;
 };
 
 }  // namespace test_runner
 
 #endif  // COMPONENTS_TEST_RUNNER_WEB_AX_OBJECT_PROXY_H_