Move IA2 Role handling to AXPlatformNodeWin.

ui/accessibility/platform/ax_platform_node_win.h

 // Copyright 2015 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 UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_WIN_H_
 #define UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_WIN_H_
 
 #include <atlbase.h>
 #include <atlcom.h>
 #include <oleacc.h>
@@ skipping 258 matching lines @@
  protected:
   AXPlatformNodeWin();
 
   int MSAAState();
 
   int MSAARole();
   std::string StringOverrideForMSAARole();
 
   int32_t IA2State();
 
+  int32_t IA2Role();
+
   // AXPlatformNodeBase overrides.
   void Dispose() override;
 
  private:
   int MSAAEvent(ui::AXEvent event);
   bool IsWebAreaForPresentationalIframe();
   bool ShouldNodeHaveReadonlyState(const AXNodeData& data) const;
   bool ShouldNodeHaveFocusableState(const AXNodeData& data) const;
 
   HRESULT GetStringAttributeAsBstr(
@@ skipping 28 matching lines @@
   // Does not return a new reference.
   AXPlatformNodeWin* GetTargetFromChildID(const VARIANT& var_id);
 
   // Returns true if this node is in a treegrid.
   bool IsInTreeGrid();
 };
 
 }  // namespace ui
 
 #endif  // UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_WIN_H_