MacViews: Implement NSAccessibilityPressAction for Views with clickable roles.

ui/accessibility/ax_role_properties.cc

Index: ui/accessibility/ax_role_properties.cc
diff --git a/ui/accessibility/ax_role_properties.cc b/ui/accessibility/ax_role_properties.cc
new file mode 100644
index 0000000000000000000000000000000000000000..aa712fab75c74cca9a6860cf1e87e7914645beb6
--- /dev/null
+++ b/ui/accessibility/ax_role_properties.cc
@@ -0,0 +1,35 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/accessibility/ax_role_properties.h"
+
+namespace ui {
+
+bool IsRoleClickable(AXRole role) {
+  switch (role) {
+    case AX_ROLE_BUTTON:
+    case AX_ROLE_CHECK_BOX:
+    case AX_ROLE_COLOR_WELL:
+    case AX_ROLE_DISCLOSURE_TRIANGLE:
+    case AX_ROLE_IMAGE_MAP_LINK:
+    case AX_ROLE_LINK:
+    case AX_ROLE_LIST_BOX_OPTION:
+    case AX_ROLE_MENU_BUTTON:
+    case AX_ROLE_MENU_ITEM:
+    case AX_ROLE_MENU_ITEM_CHECK_BOX:
+    case AX_ROLE_MENU_ITEM_RADIO:
+    case AX_ROLE_MENU_LIST_OPTION:
+    case AX_ROLE_MENU_LIST_POPUP:
+    case AX_ROLE_POP_UP_BUTTON:
+    case AX_ROLE_RADIO_BUTTON:
+    case AX_ROLE_SWITCH:
+    case AX_ROLE_TAB:
+    case AX_ROLE_TOGGLE_BUTTON:
+      return true;
+    default:
+      return false;
+  }
+}
+
+}  // namespace ui