Implement chrome.brailleDisplayPrivate API

chrome/test/data/extensions/api_test/braille_display_private/key_events/manifest.json

Index: chrome/test/data/extensions/api_test/braille_display_private/key_events/manifest.json
diff --git a/chrome/test/data/extensions/api_test/streams_private/handle_mime_type/manifest.json b/chrome/test/data/extensions/api_test/braille_display_private/key_events/manifest.json
similarity index 55%
copy from chrome/test/data/extensions/api_test/streams_private/handle_mime_type/manifest.json
copy to chrome/test/data/extensions/api_test/braille_display_private/key_events/manifest.json
index 6dce5dae7ffc010417c4c37d302c4dda1b2faefa..1353b5a23779f0b7184cd99c3d7985ae9a51ada8 100644
--- a/chrome/test/data/extensions/api_test/streams_private/handle_mime_type/manifest.json
+++ b/chrome/test/data/extensions/api_test/braille_display_private/key_events/manifest.json
@@ -1,16 +1,11 @@
 {
-  "name": "Test Download redirect",
-  "version": "1",
-  "manifest_version": 2,
   "key": "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDJ8Hl8K6R+n/hrPsN1ienxRU3GbL00wFHLJNML45MHwT+3PstgWf4EgC3wbyyTXFtbvJC+Hn14Hyltfhsa+cSraldNHeL+rl+FL04kE4uYHq8YhOYEtzUfg380+o7XV9oESKu9oLTeG9QuQCjmlp3MUqC9wm7ICjxR9flODClOkQIDAQAB",
+  "name": "chrome.brailleDisplayPrivate.keyEvents",
+  "version": "0.1",
+  "manifest_version": 2,
+  "description": "End-to-end test for receiving key events from a braille display",
   "background": {
-    "scripts": ["background.js"]
+    "scripts": [ "test.js" ]
   },
-  "mime_types": [
-    "application/msword",
-    "plain/text"
-  ],
-  "permissions": [
-    "streamsPrivate"
-  ]
+  "permissions": ["brailleDisplayPrivate"]
 }