Add additional commands in compat mode.

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

Index: chrome/browser/resources/chromeos/chromevox/manifest.json.jinja2
diff --git a/chrome/browser/resources/chromeos/chromevox/manifest.json.jinja2 b/chrome/browser/resources/chromeos/chromevox/manifest.json.jinja2
index dde3bd282d426d363c87dd2837fbdfcc9a511da1..372fc22dc02e4fcef30887652f6e144f0db704e5 100644
--- a/chrome/browser/resources/chromeos/chromevox/manifest.json.jinja2
+++ b/chrome/browser/resources/chromeos/chromevox/manifest.json.jinja2
@@ -177,6 +177,18 @@
         "chromeos": "Search+Shift+H"
       }
     },
+    "compatPreviousLine": {
+      "description": "__MSG_CHROMEVOX_PREVIOUS_HEADING__",
+      "suggested_key": {
+        "chromeos": "Search+Shift+Up"
+      }
+    },
+    "compatNextLine": {
+      "description": "__MSG_CHROMEVOX_PREVIOUS_HEADING__",
+      "suggested_key": {
+        "chromeos": "Search+Shift+Down"
+      }
+    },
     "compatPrevious": {
       "description": "__MSG_CHROMEVOX_PREVIOUS_HEADING__",
       "suggested_key": {
@@ -243,6 +255,12 @@
         "chromeos": "Search+Space"
       }
     },
+    "compatDoDefault": {
+      "description": "__MSG_CHROMEVOX_PERFORM_DEFAULT_ACTION__",
+      "suggested_key": {
+        "chromeos": "Search+Shift+Space"
+      }
+    },
     "toggleChromeVoxVersion": {
       "description": "__MSG_CHROMEVOX_TOGGLE_CHROMEVOX__",
       "suggested_key": {