Add conversion rule for WebAXRoleDescriptionList

The Related CL:
https://codereview.chromium.org/609793002/

BUG=226505
TBR=rockot

Review URL: https://codereview.chromium.org/607053002

Cr-Commit-Position: refs/heads/master@{#297788}

chrome/common/extensions/api/automation.idl

@@ -76,6 +76,7 @@
     contentInfo,
     definition,
     descriptionListDetail,
+    descriptionList,
     descriptionListTerm,
     desktop,
     dialog,

content/browser/accessibility/browser_accessibility_win.cc

@@ -3452,6 +3452,11 @@ void BrowserAccessibilityWin::InitRoleAndState() {
       ia2_role_ = IA2_ROLE_PARAGRAPH;
       ia_state_ |= STATE_SYSTEM_READONLY;
       break;
+    case ui::AX_ROLE_DESCRIPTION_LIST:
+      role_name_ = html_tag;
+      ia_role_ = ROLE_SYSTEM_LIST;
+      ia_state_ |= STATE_SYSTEM_READONLY;
+      break;
     case ui::AX_ROLE_DESCRIPTION_LIST_TERM:
       ia_role_ = ROLE_SYSTEM_LISTITEM;
       ia_state_ |= STATE_SYSTEM_READONLY;

content/renderer/accessibility/blink_ax_enum_conversion.cc

@@ -122,6 +122,8 @@ ui::AXRole AXRoleFromBlink(blink::WebAXRole role) {
       return ui::AX_ROLE_DEFINITION;
     case blink::WebAXRoleDescriptionListDetail:
       return ui::AX_ROLE_DESCRIPTION_LIST_DETAIL;
+    case blink::WebAXRoleDescriptionList:
+      return ui::AX_ROLE_DESCRIPTION_LIST;
     case blink::WebAXRoleDescriptionListTerm:
       return ui::AX_ROLE_DESCRIPTION_LIST_TERM;
     case blink::WebAXRoleDetails:

content/shell/renderer/test_runner/web_ax_object_proxy.cc

@@ -62,6 +62,8 @@ std::string RoleToString(blink::WebAXRole role)
       return result.append("Definition");
     case blink::WebAXRoleDescriptionListDetail:
       return result.append("DescriptionListDetail");
+    case blink::WebAXRoleDescriptionList:
+      return result.append("DescriptionList");
     case blink::WebAXRoleDescriptionListTerm:
       return result.append("DescriptionListTerm");
     case blink::WebAXRoleDialog:

ui/accessibility/ax_enums.idl

@@ -82,6 +82,7 @@
     content_info,
     definition,
     description_list_detail,
+    description_list,
     description_list_term,
     desktop,
     details,

ui/accessibility/platform/ax_platform_node_mac.mm

@@ -41,6 +41,7 @@ RoleMap BuildRoleMap() {
       {ui::AX_ROLE_CONTENT_INFO, NSAccessibilityGroupRole},
       {ui::AX_ROLE_DEFINITION, NSAccessibilityGroupRole},
       {ui::AX_ROLE_DESCRIPTION_LIST_DETAIL, NSAccessibilityGroupRole},
+      {ui::AX_ROLE_DESCRIPTION_LIST, NSAccessibilityListRole},
       {ui::AX_ROLE_DESCRIPTION_LIST_TERM, NSAccessibilityGroupRole},
       {ui::AX_ROLE_DIALOG, NSAccessibilityGroupRole},
       {ui::AX_ROLE_DETAILS, NSAccessibilityGroupRole},