Forward four more BrowserAccessibility APIs to AXPlatformNode.

ui/views/accessibility/native_view_accessibility_base.cc

 // Copyright (c) 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/views/accessibility/native_view_accessibility_base.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "ui/events/event_utils.h"
 #include "ui/gfx/native_widget_types.h"
@@ skipping 79 matching lines @@
     data_.AddState(ui::AX_STATE_INVISIBLE);
 
   // Make sure this element is excluded from the a11y tree if there's a
   // focusable parent. All keyboard focusable elements should be leaf nodes.
   // Exceptions to this rule will themselves be accessibility focusable.
   if (IsViewUnfocusableChildOfFocusableAncestor(view_))
     data_.role = ui::AX_ROLE_IGNORED;
   return data_;
 }
 
+const ui::AXTreeData& NativeViewAccessibilityBase::GetTreeData() const {
+  CR_DEFINE_STATIC_LOCAL(ui::AXTreeData, empty_data, ());
+  return empty_data;
+}
+
 int NativeViewAccessibilityBase::GetChildCount() {
   int child_count = view_->child_count();
 
   std::vector<Widget*> child_widgets;
   PopulateChildWidgetVector(&child_widgets);
   child_count += child_widgets.size();
 
   return child_count;
 }
 
@@ skipping 138 matching lines @@
               child_widget_platform_node->GetDelegate());
       if (child_widget_view_accessibility->parent_widget() != widget)
         child_widget_view_accessibility->SetParentWidget(widget);
     }
 
     result_child_widgets->push_back(child_widget);
   }
 }
 
 }  // namespace views