Always return a subrole when the Mac accessibility role is AXList.

content/browser/accessibility/browser_accessibility_cocoa.mm

 // 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.
 
 #include <execinfo.h>
 
 #import "content/browser/accessibility/browser_accessibility_cocoa.h"
 
 #include <map>
 
@@ skipping 829 matching lines @@
   ui::AXRole browserAccessibilityRole = [self internalRole];
   if (browserAccessibilityRole == ui::AX_ROLE_TEXT_FIELD &&
       GetState(browserAccessibility_, ui::AX_STATE_PROTECTED)) {
     return @"AXSecureTextField";
   }
 
   NSString* htmlTag = NSStringForStringAttribute(
       browserAccessibility_, ui::AX_ATTR_HTML_TAG);
 
   if (browserAccessibilityRole == ui::AX_ROLE_LIST) {
-    if ([htmlTag isEqualToString:@"ul"] ||
-        [htmlTag isEqualToString:@"ol"]) {
+    if ([htmlTag isEqualToString:@"dl"]) {
+      return @"AXDescriptionList";
+    } else {
       return @"AXContentList";
-    } else if ([htmlTag isEqualToString:@"dl"]) {
-      return @"AXDescriptionList";
     }
   }
 
   return NativeSubroleFromAXRole(browserAccessibilityRole);
 }
 
 // Returns all tabs in this subtree.
 - (NSArray*)tabs {
   NSMutableArray* tabSubtree = [[[NSMutableArray alloc] init] autorelease];
 
@@ skipping 706 matching lines @@
     return [super hash];
   return browserAccessibility_->GetId();
 }
 
 - (BOOL)accessibilityShouldUseUniqueId {
   return YES;
 }
 
 @end