ARIA role spinbutton should expose AXRole as AXIncrementor.

ui/accessibility/platform/ax_platform_node_mac.mm

 // 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.
 
 #import "ui/accessibility/platform/ax_platform_node_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/strings/sys_string_conversions.h"
 #import "ui/accessibility/platform/ax_platform_node_delegate.h"
@@ skipping 48 matching lines @@
       {ui::AX_ROLE_GRID, NSAccessibilityGridRole},
       {ui::AX_ROLE_GROUP, NSAccessibilityGroupRole},
       {ui::AX_ROLE_GROW_AREA, NSAccessibilityGrowAreaRole},
       {ui::AX_ROLE_HEADING, @"AXHeading"},
       {ui::AX_ROLE_HELP_TAG, NSAccessibilityHelpTagRole},
       {ui::AX_ROLE_IFRAME, NSAccessibilityGroupRole},
       {ui::AX_ROLE_IGNORED, NSAccessibilityUnknownRole},
       {ui::AX_ROLE_IMAGE, NSAccessibilityImageRole},
       {ui::AX_ROLE_IMAGE_MAP, NSAccessibilityGroupRole},
       {ui::AX_ROLE_IMAGE_MAP_LINK, NSAccessibilityLinkRole},
-      {ui::AX_ROLE_INCREMENTOR, NSAccessibilityIncrementorRole},
       {ui::AX_ROLE_LABEL_TEXT, NSAccessibilityGroupRole},
       {ui::AX_ROLE_LINK, NSAccessibilityLinkRole},
       {ui::AX_ROLE_LIST, NSAccessibilityListRole},
       {ui::AX_ROLE_LIST_BOX, NSAccessibilityListRole},
       {ui::AX_ROLE_LIST_BOX_OPTION, NSAccessibilityStaticTextRole},
       {ui::AX_ROLE_LIST_ITEM, NSAccessibilityGroupRole},
       {ui::AX_ROLE_LIST_MARKER, @"AXListMarker"},
       {ui::AX_ROLE_LOG, NSAccessibilityGroupRole},
       {ui::AX_ROLE_MAIN, NSAccessibilityGroupRole},
       {ui::AX_ROLE_MARQUEE, NSAccessibilityGroupRole},
@@ skipping 23 matching lines @@
       {ui::AX_ROLE_ROOT_WEB_AREA, @"AXWebArea"},
       {ui::AX_ROLE_ROW, NSAccessibilityRowRole},
       {ui::AX_ROLE_ROW_HEADER, @"AXCell"},
       {ui::AX_ROLE_RULER, NSAccessibilityRulerRole},
       {ui::AX_ROLE_RULER_MARKER, NSAccessibilityRulerMarkerRole},
       {ui::AX_ROLE_SCROLL_BAR, NSAccessibilityScrollBarRole},
       {ui::AX_ROLE_SEARCH, NSAccessibilityGroupRole},
       {ui::AX_ROLE_SHEET, NSAccessibilitySheetRole},
       {ui::AX_ROLE_SLIDER, NSAccessibilitySliderRole},
       {ui::AX_ROLE_SLIDER_THUMB, NSAccessibilityValueIndicatorRole},
-      {ui::AX_ROLE_SPIN_BUTTON, NSAccessibilitySliderRole},
+      {ui::AX_ROLE_SPIN_BUTTON, NSAccessibilityIncrementorRole},
       {ui::AX_ROLE_SPLITTER, NSAccessibilitySplitterRole},
       {ui::AX_ROLE_SPLIT_GROUP, NSAccessibilitySplitGroupRole},
       {ui::AX_ROLE_STATIC_TEXT, NSAccessibilityStaticTextRole},
       {ui::AX_ROLE_STATUS, NSAccessibilityGroupRole},
       {ui::AX_ROLE_SVG_ROOT, NSAccessibilityGroupRole},
       {ui::AX_ROLE_SYSTEM_WIDE, NSAccessibilityUnknownRole},
       {ui::AX_ROLE_TAB, NSAccessibilityRadioButtonRole},
       {ui::AX_ROLE_TABLE, NSAccessibilityTableRole},
       {ui::AX_ROLE_TABLE_HEADER_CONTAINER, NSAccessibilityGroupRole},
       {ui::AX_ROLE_TAB_LIST, NSAccessibilityTabGroupRole},
@@ skipping 187 matching lines @@
   delete this;
 }
 
 gfx::NativeViewAccessible AXPlatformNodeMac::GetNativeViewAccessible() {
   if (!native_node_)
     native_node_.reset([[AXPlatformNodeCocoa alloc] initWithNode:this]);
   return native_node_.get();
 }
 
 }  // namespace ui