Change EditingNG from experimental to test

EditingNG has some instabilities such as <crbug.com/1121885>.
In order to help users who turn on "Experimental Web Platform
features" from hitting these issues, this patch changes
EditingNG back from "experimental" to "test".

Once ourstanding issues were resolved, we will change it back
to "experimental".

This is a revert of r791809 <crrev.com/c/2319947>. Some
rebaselines are needed because these tests do not seem to
honor "test" status.

Bug: 707656, 1125477
Change-Id: I433200cb7fb450036a631ee8ed578ab395413540
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2390936Reviewed-by: Yoshifumi Inoue <yosin@chromium.org>
Commit-Queue: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#804839}

content/test/data/accessibility/html/contenteditable-descendants-expected-auralinux.txt

@@ -15,8 +15,7 @@
 ++++++++++[static] name='Always expose editable tables as tables.' editable
 ++++[list] editable
 ++++++[list item] editable
-++++++++[panel] editable
-++++++++++[static] name='1. '
+++++++++[static] name='1. ' editable
 ++++++++[static] name='Editable list item.' editable
 ++[paragraph]
 ++++[static] name='Non-editable paragraph.'

content/test/data/accessibility/html/contenteditable-descendants-expected-blink.txt

@@ -26,8 +26,6 @@ rootWebArea
 ++++++++list editable richlyEditable
 ++++++++++listItem editable richlyEditable
 ++++++++++++listMarker editable richlyEditable name='1. '
-++++++++++++++staticText name='1. '
-++++++++++++++++inlineTextBox name='1. '
 ++++++++++++staticText editable richlyEditable name='Editable list item.'
 ++++++++++++++inlineTextBox name='Editable list item.'
 ++++++paragraph

content/test/data/accessibility/html/contenteditable-descendants-expected-uia-win.txt

@@ -15,8 +15,7 @@ Document
 ++++++++++Text Name='Always expose editable tables as tables.' IsControlElement=false
 ++++List
 ++++++ListItem
-++++++++Group
-++++++++++Text Name='1. ' IsControlElement=false
+++++++++Text Name='1. ' IsControlElement=false
 ++++++++Text Name='Editable list item.' IsControlElement=false
 ++Group IsControlElement=false
 ++++Text Name='Non-editable paragraph.'

content/test/data/accessibility/html/contenteditable-descendants-expected-win.txt

@@ -14,9 +14,8 @@ ROLE_SYSTEM_DOCUMENT READONLY FOCUSABLE ia2_hypertext='<obj0><obj1><obj2>' n_sel
 ++++++++ROLE_SYSTEM_CELL name='Always expose editable tables as tables.' IA2_STATE_EDITABLE ia2_hypertext='Always expose editable tables as tables.' n_selections=0
 ++++++++++ROLE_SYSTEM_STATICTEXT name='Always expose editable tables as tables.' IA2_STATE_EDITABLE ia2_hypertext='Always expose editable tables as tables.' n_selections=0
 ++++ROLE_SYSTEM_LIST IA2_STATE_EDITABLE ia2_hypertext='<obj0>' n_selections=0
-++++++ROLE_SYSTEM_LISTITEM IA2_STATE_EDITABLE ia2_hypertext='<obj0>Editable list item.' n_selections=0
-++++++++ROLE_SYSTEM_GROUPING IA2_STATE_EDITABLE ia2_hypertext='1. ' n_selections=0
-++++++++++ROLE_SYSTEM_STATICTEXT name='1. ' ia2_hypertext='1. ' n_selections=0
+++++++ROLE_SYSTEM_LISTITEM IA2_STATE_EDITABLE ia2_hypertext='1. Editable list item.' n_selections=0
+++++++++ROLE_SYSTEM_STATICTEXT name='1. ' IA2_STATE_EDITABLE ia2_hypertext='1. ' n_selections=0
 ++++++++ROLE_SYSTEM_STATICTEXT name='Editable list item.' IA2_STATE_EDITABLE ia2_hypertext='Editable list item.' n_selections=0
 ++IA2_ROLE_PARAGRAPH ia2_hypertext='Non-editable paragraph.' n_selections=0
 ++++ROLE_SYSTEM_STATICTEXT name='Non-editable paragraph.' ia2_hypertext='Non-editable paragraph.' n_selections=0

content/test/data/accessibility/html/contenteditable-descendants-with-selection-expected-auralinux.txt

@@ -15,6 +15,5 @@
 ++++++++++[static] name='Always expose editable tables as tables.' editable selection_start=0 selection_end=3
 ++++[list] editable selection_start=0 selection_end=3
 ++++++[list item] editable selection_start=0 selection_end=3
-++++++++[panel] editable selection_start=0 selection_end=3
-++++++++++[static] name='1. ' selection_start=0 selection_end=3
+++++++++[static] name='1. ' editable selection_start=0 selection_end=3
 ++++++++[static] name='Editable list item.' editable selection_start=0 selection_end=3

content/test/data/accessibility/html/contenteditable-descendants-with-selection-expected-blink.txt

@@ -26,7 +26,5 @@ rootWebArea
 ++++++++list editable richlyEditable
 ++++++++++listItem editable richlyEditable
 ++++++++++++listMarker editable richlyEditable name='1. '
-++++++++++++++staticText name='1. '
-++++++++++++++++inlineTextBox name='1. '
 ++++++++++++staticText editable richlyEditable name='Editable list item.'
 ++++++++++++++inlineTextBox name='Editable list item.'

content/test/data/accessibility/html/contenteditable-descendants-with-selection-expected-uia-win.txt

@@ -15,6 +15,5 @@ Document
 ++++++++++Text Name='Always expose editable tables as tables.' IsControlElement=false
 ++++List
 ++++++ListItem
-++++++++Group
-++++++++++Text Name='1. ' IsControlElement=false
+++++++++Text Name='1. ' IsControlElement=false
 ++++++++Text Name='Editable list item.' IsControlElement=false

content/test/data/accessibility/html/contenteditable-descendants-with-selection-expected-win.txt

@@ -14,7 +14,6 @@ ROLE_SYSTEM_DOCUMENT READONLY FOCUSABLE ia2_hypertext='<obj0>' caret_offset=1 n_
 ++++++++ROLE_SYSTEM_CELL name='Always expose editable tables as tables.' IA2_STATE_EDITABLE ia2_hypertext='Always expose editable tables as tables.' n_selections=1 selection_start=0 selection_end=3
 ++++++++++ROLE_SYSTEM_STATICTEXT name='Always expose editable tables as tables.' IA2_STATE_EDITABLE ia2_hypertext='Always expose editable tables as tables.' n_selections=1 selection_start=0 selection_end=3
 ++++ROLE_SYSTEM_LIST IA2_STATE_EDITABLE ia2_hypertext='<obj0>' n_selections=1 selection_start=0 selection_end=3
-++++++ROLE_SYSTEM_LISTITEM IA2_STATE_EDITABLE ia2_hypertext='<obj0>Editable list item.' n_selections=1 selection_start=0 selection_end=3
-++++++++ROLE_SYSTEM_GROUPING IA2_STATE_EDITABLE ia2_hypertext='1. ' n_selections=1 selection_start=0 selection_end=3
-++++++++++ROLE_SYSTEM_STATICTEXT name='1. ' ia2_hypertext='1. ' n_selections=1 selection_start=0 selection_end=3
+++++++ROLE_SYSTEM_LISTITEM IA2_STATE_EDITABLE ia2_hypertext='1. Editable list item.' n_selections=1 selection_start=0 selection_end=3
+++++++++ROLE_SYSTEM_STATICTEXT name='1. ' IA2_STATE_EDITABLE ia2_hypertext='1. ' n_selections=1 selection_start=0 selection_end=3
 ++++++++ROLE_SYSTEM_STATICTEXT name='Editable list item.' IA2_STATE_EDITABLE ia2_hypertext='Editable list item.' n_selections=1 selection_start=0 selection_end=3

third_party/blink/renderer/platform/runtime_enabled_features.json5

@@ -714,7 +714,7 @@
     {
       // http://crbug.com/707656 content editable in LayoutNG.
       name: "EditingNG",
-      status: "experimental",
+      status: "test",
     },
     {
       name: "EncryptedMediaEncryptionSchemeQuery",