Bug 1865582: Include xlink:title in svg link name computation, r=Jamie

This revision implements HTMLLinkAccessible::NativeName, which, if the element
is present in an SVG context, checks the xlink:title attribute for the name, as
required by the accessible name specification. This revision also removes eight
expected failures from the relevant web platform test meta file.

Differential Revision: https://phabricator.services.mozilla.com/D203031

accessible/html/HTMLLinkAccessible.cpp

@@ -112,6 +112,17 @@ void HTMLLinkAccessible::DOMAttributeChanged(int32_t aNameSpaceID,
   }
 }
 
+ENameValueFlag HTMLLinkAccessible::NativeName(nsString& aName) const {
+  if (mContent->IsSVGElement()) {
+    mContent->AsElement()->GetAttr(kNameSpaceID_XLink, nsGkAtoms::title, aName);
+    if (!aName.IsEmpty()) {
+      return eNameOK;
+    }
+  }
+
+  return HyperTextAccessible::NativeName(aName);
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // HyperLinkAccessible
 

accessible/html/HTMLLinkAccessible.h

@@ -46,6 +46,8 @@ class HTMLLinkAccessible : public HyperTextAccessible {
                                    const nsAttrValue* aOldValue,
                                    uint64_t aOldState) override;
 
+  virtual ENameValueFlag NativeName(nsString& aName) const override;
+
   enum { eAction_Jump = 0 };
 };
 

testing/web-platform/meta/svg-aam/name/comp_host_language_label.html.ini

@@ -1,24 +0,0 @@
-[comp_host_language_label.html]
-  [[xlink:title\][href\] > circle]
-    expected: FAIL
-
-  [[xlink:title\][href\] > rect]
-    expected: FAIL
-
-  [[xlink:title\][href\] > polygon]
-    expected: FAIL
-
-  [[xlink:title\][href\] > g]
-    expected: FAIL
-
-  [[xlink:title\][xlink:href\] > circle]
-    expected: FAIL
-
-  [[xlink:title\][xlink:href\] > rect]
-    expected: FAIL
-
-  [[xlink:title\][xlink:href\] > polygon]
-    expected: FAIL
-
-  [[xlink:title\][xlink:href\] > g]
-    expected: FAIL