Chromium side Implementation to expose aria properties - setsize & posinset

content/browser/accessibility/browser_accessibility_cocoa.mm

Index: content/browser/accessibility/browser_accessibility_cocoa.mm
diff --git a/content/browser/accessibility/browser_accessibility_cocoa.mm b/content/browser/accessibility/browser_accessibility_cocoa.mm
index 9781913557fe81c12b348564a5b04615cdbf4cb2..49883eefa65e65b4fbf81469addc8f273cc518e9 100644
--- a/content/browser/accessibility/browser_accessibility_cocoa.mm
+++ b/content/browser/accessibility/browser_accessibility_cocoa.mm
@@ -108,6 +108,8 @@ NSDictionary* attributeToMethodNameMap = nil;
     { @"AXARIAAtomic", @"ariaAtomic" },
     { @"AXARIABusy", @"ariaBusy" },
     { @"AXARIALive", @"ariaLive" },
+    { @"AXARIAPosInSet", @"ariaPosInSet" },
+    { @"AXARIASetSize", @"ariaSetSize" },
     { @"AXARIARelevant", @"ariaRelevant" },
     { @"AXDropEffects", @"dropeffect" },
     { @"AXGrabbed", @"grabbed" },
@@ -170,6 +172,24 @@ NSDictionary* attributeToMethodNameMap = nil;
       browserAccessibility_, ui::AX_ATTR_LIVE_RELEVANT);
 }
 
+- (NSNumber*)ariaPosInSet {
+  if (browserAccessibility_->HasIntAttribute(ui::AX_ATTR_SET_SIZE))
+    int pos = browserAccessibility_->GetIntAttribute(ui::AX_ATTR_POS_IN_SET);
+  else
+    int pos = GetIndexInParent() + 1;
+
+  return [NSNumber numberWithInt:pos];
+}
+
+- (NSNumber*)ariaSetSize {
+  if (browserAccessibility_->HasIntAttribute(ui::AX_ATTR_SET_SIZE))
+    int size = browserAccessibility_->GetIntAttribute(ui::AX_ATTR_SET_SIZE);
+  else
+    int size = browserAccessibility_->PlatformChildCount();
+
+  return [NSNumber numberWithInt:size];
+}
+
 // Returns an array of BrowserAccessibilityCocoa objects, representing the
 // accessibility children of this object.
 - (NSArray*)children {
@@ -1406,6 +1426,15 @@ NSDictionary* attributeToMethodNameMap = nil;
         nil]];
   }
 
+  if (browserAccessibility_->GetRole() == ui::AX_ROLE_LIST_BOX_OPTION &&
+      browserAccessibility_->GetParent() &&
+      browserAccessibility_->GetParent()->GetRole() == ui::AX_ROLE_LIST_BOX) {
+    [ret addObjectsFromArray:[NSArray arrayWithObjects:
+        @"AXARIAPosInSet",
+        @"AXARIASetSize",
+        nil]];
+  }
+
   // Live regions.
   if (browserAccessibility_->HasStringAttribute(
           ui::AX_ATTR_LIVE_STATUS)) {