Set keys for SwitchAccessEventHandler to capture using accessibiltyPrivate API

chrome/common/extensions/api/accessibility_private.json

Index: chrome/common/extensions/api/accessibility_private.json
diff --git a/chrome/common/extensions/api/accessibility_private.json b/chrome/common/extensions/api/accessibility_private.json
index 0b9f629f1defebdc7057e17d586e91fc53bd6e91..cc34f2b55f218c6d9a8cf418fe650e7d85d9d73f 100644
--- a/chrome/common/extensions/api/accessibility_private.json
+++ b/chrome/common/extensions/api/accessibility_private.json
@@ -100,6 +100,24 @@
             "description": "True to darken screen; false to undarken screen."
           }
         ]
+      },
+      {
+        "name": "setSwitchAccessKeys",
+        "type": "function",
+        "description": "Change the keyboard keys captured by Switch Access.",
+        "parameters": [
+          {
+            "name": "key_codes",
+            "type": "array",
+            "items": {
+              "type": "integer",
+              "minimum": 48, // '0' key
+              "maximum": 90  // 'z' key
+            },
+            "description": "The key codes for the keys that will be captured."
+          }
+        ],
+        "platforms": ["chromeos"]
       }
     ],
     "events": [