Change EditingNG from experimental to test

This patch changes runtime enabled feature EditingNG from experimental
to test to avoid users who turn on "Experimental Web Platform features"
not to hit EditingNG issues.

Bug: 707656, 1125477
Change-Id: I81b56ff56c44da74b0702e4e2f2d81355a0a0c2e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2437834
Commit-Queue: Koji Ishii <kojii@chromium.org>
Auto-Submit: Yoshifumi Inoue <yosin@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#812020}

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

@@ -719,7 +719,7 @@
     {
       // http://crbug.com/707656 content editable in LayoutNG.
       name: "EditingNG",
-      status: "experimental",
+      status: "test",
     },
     {
       name: "EncryptedMediaEncryptionSchemeQuery",