Bug 1553275 [wpt PR 16718] - Add experimental support for enterKeyHint., a=testonly

Automatic update from web-platform-tests
Add experimental support for enterKeyHint.

enterKeyHint allows customization of the virtual keyboard enter
key. Enabled behind a flag since it isn't approved to ship yet.

Spec:
whatwg/html#3538

BUG=634330

Cq-Include-Trybots: luci.chromium.try​:linux_layout_tests_layout_ng
Change-Id: I32b510d8157e0c676300a38bb4c7fa2bbced0b3d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1221696
Commit-Queue: Dave Tapuska <dtapuska@chromium.org>
Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Reviewed-by: Changwan Ryu <changwan@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Reviewed-by: Joshua Bell <jsbell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#661904}

--

wp5At-commits: 74870bb3fbf231c8b89f529fbfea7f22ad149c33
wpt-pr: 16718

Author: dtapuska

testing/web-platform/tests/html/dom/elements-misc.js

@@ -53,6 +53,7 @@ var miscElements = {
 
   // Global attributes should exist even on unknown elements
   undefinedelement: {
+    enterKeyHint: {type: "enum", keywords: ["enter", "done", "go", "next", "previous", "search", "send"]},
     inputMode: {type: "enum", keywords: ["none", "text", "tel", "url", "email", "numeric", "decimal", "search"]},
   },
 };

testing/web-platform/tests/html/semantics/forms/attributes-common-to-form-controls/contains.json

@@ -23,6 +23,10 @@
         "id": "autofocusing-a-form-control-the-autofocus-attribute",
         "original_id": "autofocusing-a-form-control:-the-autofocus-attribute"
     },
+    {
+        "id": "input-modalities-the-enterkeyhint-attribute",
+        "original_id": "input-modalities:-the-enterkeyhint-attribute"
+    },
     {
         "id": "input-modalities-the-inputmode-attribute",
         "original_id": "input-modalities:-the-inputmode-attribute"
@@ -31,4 +35,4 @@
         "id": "autofilling-form-controls-the-autocomplete-attribute",
         "original_id": "autofilling-form-controls:-the-autocomplete-attribute"
     }
-]
+]