[Chrome OS ECHO]: Add default locale to manifest

chrome/browser/resources/chromeos/echo/manifest.json

 {
   // chrome-extension://dfgpjpjbeeflfdhdpabeeeheghdmeigc
   "key": "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCzzB6c4Z0cusW6trA/issIOyMaxXtPfMYQclO0Dg5rOrS8SZLOAio0G4TpYDvY8z/BPdAH3a1BOSeetey8tBSdcIhOoYpqN3i9yIFuZVwHuOt83AWnJrxinVUpY05HtTblopGvGtQNlCR5crMdG+uc2yI3NlPOFZVDrFXtOv/LXQIDAQAB",
   "name": "Chrome OS ECHO Extension",
   "version": "0.0.2",
   "description": "Chrome OS ECHO Extension",
   // TODO(gauravsh): Get rid of https://www-googleapis-test.sandbox.google.com once
   //                 production service is up and running. crosbug.com/29809
   "manifest_version": 2,
   "content_security_policy": "default-src 'self'; script-src 'self' https://apis.google.com; frame-src 'self' https://www.googleapis.com https://www-googleapis-test.sandbox.google.com;",
   "permissions": [
       "cookies",
       "echoPrivate",
       "https://*/*"
    ],
+  "default_locale": "en",

[Nikita (slow), 2012/04/25 10:31:23]

Shouldn't it be "en-US"? I know that "en" is implicitly translated into "en-US"
but still.

   "web_accessible_resources": [
     "main.html",
     "main.js"
   ],
   "intents": {
     "https://crosecho.com/startEcho": [{
       "type" : ["application/vnd.chromeos.echo"],
       "title" : "Initiate Chrome OS ECHO",
       "path" : "main.html",
       "disposition" : "inline"
     }]
   }
 }