MacViews: Accessibility bridge

ui/views/cocoa/bridged_content_view.mm

Index: ui/views/cocoa/bridged_content_view.mm
diff --git a/ui/views/cocoa/bridged_content_view.mm b/ui/views/cocoa/bridged_content_view.mm
index 8fc558fcb5af4684ac43bb004cb2474a2eb960c1..3cb513fcfabdfafe5383b898e45674fa04ff6aa1 100644
--- a/ui/views/cocoa/bridged_content_view.mm
+++ b/ui/views/cocoa/bridged_content_view.mm
@@ -293,4 +293,18 @@
   return @[];
 }
 
+// NSAccessibility informal protocol implementation.
+
+- (id)accessibilityAttributeValue:(NSString*)attribute {
+  if ([attribute isEqualToString:NSAccessibilityChildrenAttribute]) {
+    return @[ hostedView_->GetNativeViewAccessible() ];
+  }
+
+  return [super accessibilityAttributeValue:attribute];
+}
+
+- (id)accessibilityHitTest:(NSPoint)point {
+  return [hostedView_->GetNativeViewAccessible() accessibilityHitTest:point];
+}
+
 @end