Begin introducing some of the initial pieces for ChromeVox next commands.

chrome/browser/resources/chromeos/chromevox/manifest.json.jinja2

 {
 {%if key is defined %}
   "key": "{{key}}",
 {% endif %}
   "manifest_version": 2,
   "name": "ChromeVox",
   "version": "{{set_version}}",
   "description": "ChromeVox - Giving Voice to Chrome.",
 {% if is_guest_manifest == '1' %}
   "incognito": "split",
 {% endif %}
   "background": {
 {% if use_chromevox_next == '1' %}
     "page": "cvox2/background/background.html"
 {% else %}
     "page": "chromevox/background/background.html"
 {% endif %}
   },
   "permissions": [
     "accessibilityPrivate",
     "bookmarks",
     "brailleDisplayPrivate",
+{% if use_chromevox_next == '1' %}
+    "commands.accessibility",
+{% endif %}
     "commandLinePrivate",
     "experimental",
     "history",
     "storage",
     "systemPrivate",
     "tabs",
     "tts",
     "virtualKeyboardPrivate",
     "<all_urls>"
   ],
   "content_scripts": [
     {
       "matches": [ "<all_urls>" ],
       "exclude_globs": [ "chrome-extension://mndnfokpggljbaajbnioimlmbfngpief/chromevox/background/background.html" ],
       "all_frames": true,
       "js": [
-{% if use_chromevox_next == '1' %}
-        "closure/closure_preinit.js",
-        "closure/base.js",
-        "deps.js",
-        "cvox2/injected/loader.js"
-{% else %}
         "chromeVoxChromePageScript.js"
-{% endif %}
       ]
     }
   ],
   "web_accessible_resources": [
     "chromevox/injected/api.js",
     "chromevox/injected/api_util.js",
     "chromevox/injected/mathjax.js",
     "chromevox/injected/mathjax_external_util.js"
   ],
 {% if use_chromevox_next == '1' %}
   "automation": {
     "desktop": true
   },
+  "commands": {
+    "nextElement": {
+      "description": "Moves to the next element",
+      "suggested_key": {
+        "chromeos": "Search+Shift+Right"
+      }
+    },
+    "previousElement": {
+      "description": "Moves to the previous element",
+      "suggested_key": {
+        "chromeos": "Search+Shift+Left"
+      }
+    },
+    "nextLine": {
+      "description": "Moves to the next line",
+      "suggested_key": {
+        "chromeos": "Search+Shift+Down"
+      }
+    },
+    "previousLine": {
+      "description": "Moves to the previous line",
+      "suggested_key": {
+        "chromeos": "Search+Shift+Up"
+      }
+    }
+  },
 {% endif %}
   "default_locale": "en"
 }