Support ariaDescription DOM property

The aria-description property is now in the master branch of the
draft ARIA spec.

Bug: 1006767
Change-Id: Ic23904c8d8de32aa0f7ff3c4c03ec8a9a26c6b48
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1999301Reviewed-by: Mike West <mkwst@chromium.org>
Reviewed-by: Mason Freed <masonfreed@chromium.org>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Commit-Queue: Aaron Leventhal <aleventhal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#743093}

third_party/blink/renderer/core/dom/aria_attributes.idl

@@ -16,6 +16,7 @@
     [CEReactions, Reflect=aria_colindex] attribute DOMString? ariaColIndex;
     [CEReactions, Reflect=aria_colspan] attribute DOMString? ariaColSpan;
     [CEReactions, Reflect=aria_current] attribute DOMString? ariaCurrent;
+    [RuntimeEnabled=AccessibilityExposeARIAAnnotations, CEReactions, Reflect=aria_description] attribute DOMString? ariaDescription;
     [CEReactions, Reflect=aria_disabled] attribute DOMString? ariaDisabled;
     [CEReactions, Reflect=aria_expanded] attribute DOMString? ariaExpanded;
     [CEReactions, Reflect=aria_haspopup] attribute DOMString? ariaHasPopup;

third_party/blink/renderer/platform/runtime_enabled_features.json5

@@ -116,7 +116,6 @@
     },
     {
       name: "AccessibilityExposeARIAAnnotations",
-      origin_trial_feature_name: "AccessibilityExposeARIAAnnotations",
       status: "experimental",
     },
     {

third_party/blink/web_tests/accessibility/aom-element-internals-aria.html

@@ -177,5 +177,15 @@ test(function() {
 }, "aria-posinset");
 
 
+test(function() {
+  const element = createTestElement("ariaDescription");
+  element.role = 'button';
+  const axElement = axElementById(element.id);
+  element.internals.ariaDescription = 'better than apple pie';
+  assert_equals(axElement.description, 'better than apple pie',
+    "ariaDescription can be set through ElementInternals");
+  element.remove();
+}, "aria-description");
+
 </script>
 </body>

third_party/blink/web_tests/external/wpt/dom/nodes/aria-attribute-reflection.tentative.html

@@ -109,6 +109,17 @@ test(function(t) {
 
 <div id="disabled" aria-disabled="true"></div>
 
+<div id="description" aria-description="cold as ice"></div>
+
+<script>
+test(function(t) {
+    var element = document.getElementById("description");
+    assert_equals(element.ariaDescription, "cold as ice");
+    element.ariaDescription = "hot as fire";
+    assert_equals(element.getAttribute("aria-description"), "hot as fire");
+}, "aria-description attribute reflects.");
+</script>
+
 <script>
 test(function(t) {
     var element = document.getElementById("disabled");

third_party/blink/web_tests/webexposed/element-instance-property-listing-expected.txt

@@ -41,6 +41,7 @@ namespace http://www.w3.org/1999/xhtml
     property ariaControlsElements
     property ariaCurrent
     property ariaDescribedByElements
+    property ariaDescription
     property ariaDetailsElements
     property ariaDisabled
     property ariaErrorMessageElement
@@ -1250,6 +1251,7 @@ namespace http://www.w3.org/2000/svg
     property ariaControlsElements
     property ariaCurrent
     property ariaDescribedByElements
+    property ariaDescription
     property ariaDetailsElements
     property ariaDisabled
     property ariaErrorMessageElement

third_party/blink/web_tests/webexposed/global-interface-listing-expected.txt

@@ -1993,6 +1993,7 @@ interface Element : Node
     getter ariaControlsElements
     getter ariaCurrent
     getter ariaDescribedByElements
+    getter ariaDescription
     getter ariaDetailsElements
     getter ariaDisabled
     getter ariaErrorMessageElement
@@ -2137,6 +2138,7 @@ interface Element : Node
     setter ariaControlsElements
     setter ariaCurrent
     setter ariaDescribedByElements
+    setter ariaDescription
     setter ariaDetailsElements
     setter ariaDisabled
     setter ariaErrorMessageElement
@@ -2205,6 +2207,7 @@ interface ElementInternals
     getter ariaControlsElements
     getter ariaCurrent
     getter ariaDescribedByElements
+    getter ariaDescription
     getter ariaDetailsElements
     getter ariaDisabled
     getter ariaErrorMessageElement
@@ -2261,6 +2264,7 @@ interface ElementInternals
     setter ariaControlsElements
     setter ariaCurrent
     setter ariaDescribedByElements
+    setter ariaDescription
     setter ariaDetailsElements
     setter ariaDisabled
     setter ariaErrorMessageElement