Move IA2 State handling to AXPlatformNodeWin.

ui/accessibility/platform/ax_platform_node_win.h

Index: ui/accessibility/platform/ax_platform_node_win.h
diff --git a/ui/accessibility/platform/ax_platform_node_win.h b/ui/accessibility/platform/ax_platform_node_win.h
index 38ffb05cdc5bc07b7009738343182139540c8abb..b4b19b2b10c181c96fb959173a618ca6993e360a 100644
--- a/ui/accessibility/platform/ax_platform_node_win.h
+++ b/ui/accessibility/platform/ax_platform_node_win.h
@@ -274,6 +274,8 @@ class AX_EXPORT __declspec(uuid("26f5641a-246d-457b-a96d-07f3fae6acf2"))
   int MSAARole();
   std::string StringOverrideForMSAARole();
 
+  int32_t MSAA_IA2State();

[dmazzoni, 2017/07/06 22:54:57]

Nit: I'd just call this IA2State, as MSAA usually
just refers to IAccessible. Not sure if that's
more confusing to outsiders, though, but
even though IAccessible2 extends IAccessible, it's
not from MS.

[dougt, 2017/07/11 20:59:27]

Done.

+
   // AXPlatformNodeBase overrides.
   void Dispose() override;