Implement NSAccessibilityScrollToVisibleAction on Mac

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 f0dc23827a78ca158623a549b9316d1bf17617dd..1affceb8e861fe61d46c5b73574b36dd9ec23646 100644
--- a/content/browser/accessibility/browser_accessibility_cocoa.mm
+++ b/content/browser/accessibility/browser_accessibility_cocoa.mm
@@ -2798,6 +2798,9 @@ NSString* const NSAccessibilityRequiredAttribute = @"AXRequired";
   } else if ([action isEqualToString:NSAccessibilityShowMenuAction]) {
     [self delegate]->AccessibilityShowContextMenu(
         browserAccessibility_->GetId());
+  } else if ([action isEqualToString:NSAccessibilityScrollToVisibleAction]) {
+    browserAccessibility_->manager()->ScrollToMakeVisible(
+        *browserAccessibility_, gfx::Rect());
   }
 }