a11y: Exclude children of nested keyboard accessible controls from a11y tree.

ui/gfx/native_widget_types.h

 // 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.
 
 #ifndef UI_GFX_NATIVE_WIDGET_TYPES_H_
 #define UI_GFX_NATIVE_WIDGET_TYPES_H_
 
 #include <stdint.h>
 
 #include "base/logging.h"
 #include "build/build_config.h"
 
 #if defined(OS_ANDROID)
 #include <jni.h>
+#elif defined(OS_MACOSX)
+#include <objc/objc.h>
 #endif
 
 // This file provides cross platform typedefs for native widget types.
 //   NativeWindow: this is a handle to a native, top-level window
 //   NativeView: this is a handle to a native UI element. It may be the
 //     same type as a NativeWindow on some platforms.
 //   NativeViewId: Often, in our cross process model, we need to pass around a
 //     reference to a "window". This reference will, say, be echoed back from a
 //     renderer to the browser when it wishes to query its size. On Windows we
 //     use an HWND for this.
@@ skipping 110 matching lines @@
 #endif
 
 #if defined(OS_WIN)
 typedef HFONT NativeFont;
 typedef IAccessible* NativeViewAccessible;
 #elif defined(OS_IOS)
 typedef UIFont* NativeFont;
 #ifdef __OBJC__
 typedef id NativeViewAccessible;
 #else
 typedef void* NativeViewAccessible;

[tapted, 2017/02/21 06:01:11]

I think we can get rid of this one too

[Patti Lor, 2017/02/27 05:31:03]

Done.

 #endif  // __OBJC__
 #elif defined(OS_MACOSX)
 typedef NSFont* NativeFont;
-#ifdef __OBJC__
 typedef id NativeViewAccessible;
-#else
-typedef void* NativeViewAccessible;
-#endif  // __OBJC__
 #else  // Android, Linux, Chrome OS, etc.
 // Linux doesn't have a native font type.
 #if defined(USE_X11) && !defined(OS_CHROMEOS)
 typedef AtkObject* NativeViewAccessible;
 #else
 typedef void* NativeViewAccessible;
 #endif
 #endif
 
 // A constant value to indicate that gfx::NativeCursor refers to no cursor.
@@ skipping 38 matching lines @@
 #elif defined(USE_OZONE)
 typedef int32_t AcceleratedWidget;
 constexpr AcceleratedWidget kNullAcceleratedWidget = 0;
 #else
 #error unknown platform
 #endif
 
 }  // namespace gfx
 
 #endif  // UI_GFX_NATIVE_WIDGET_TYPES_H_