Remove IsDefault from AXLayoutObject.

Mark AXNodeObject::IsDefault as final.

Written collaboratively with Aboxhall and Meredithl.

Change-Id: I201b2579fde618ab2858442f0ab8da7b88dc68f0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2227724Reviewed-by: Meredith Lane <meredithl@chromium.org>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Reviewed-by: Alice Boxhall <aboxhall@chromium.org>
Commit-Queue: Chris Hall <chrishall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#774945}

third_party/blink/renderer/modules/accessibility/ax_layout_object.cc

@@ -319,21 +319,6 @@ static bool IsLinkable(const AXObject& object) {
          object.GetLayoutObject()->IsText();
 }
 
-bool AXLayoutObject::IsDefault() const {
-  if (IsDetached())
-    return false;
-
-  // Checks for any kind of disabled, including aria-disabled.
-  if (Restriction() == kRestrictionDisabled ||
-      RoleValue() != ax::mojom::blink::Role::kButton) {
-    return false;
-  }
-
-  // Will only match :default pseudo class if it's the first default button in
-  // a form.
-  return GetElement()->MatchesDefaultPseudoClass();
-}
-
 // Requires layoutObject to be present because it relies on style
 // user-modify. Don't move this logic to AXNodeObject.
 bool AXLayoutObject::IsEditable() const {

third_party/blink/renderer/modules/accessibility/ax_layout_object.h

@@ -84,7 +84,6 @@ class MODULES_EXPORT AXLayoutObject : public AXNodeObject {
 
   // Check object role or purpose.
   bool IsAutofillAvailable() const override;
-  bool IsDefault() const final;
   bool IsEditable() const override;
   bool IsRichlyEditable() const override;
   bool IsLineBreakingObject() const override;

third_party/blink/renderer/modules/accessibility/ax_node_object.h

@@ -95,7 +95,7 @@ class MODULES_EXPORT AXNodeObject : public AXObject {
 
   // Check object role or purpose.
   bool IsControllingVideoElement() const;
-  bool IsDefault() const override;
+  bool IsDefault() const final;
   bool IsMultiline() const override;
   bool IsEditable() const override { return IsNativeTextControl(); }
   bool ComputeIsEditableRoot() const override;