Remove experimental permission from infobars API and moving it to dev channel

chrome/common/extensions/api/_api_features.json

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // See c/c/e/features/* to understand this file, in particular feature.h,
 // simple_feature.h, and base_feature_provider.h.
 
 {
   "activityLogPrivate": {
     "dependencies": ["permission:activityLogPrivate"],
@@ skipping 268 matching lines @@
     "contexts": ["blessed_extension"]
   },
   "identityPrivate": {
     "dependencies": ["permission:identityPrivate"],
     "contexts": ["blessed_extension"]
   },
   "idle": {
     "dependencies": ["permission:idle"],
     "contexts": ["blessed_extension"]
   },
+  "infobars": {
+    "dependencies": ["permission:infobars"],
+    "contexts": ["blessed_extension"]
+  },
   "input.ime": {
     "platform": "chromeos",
     "dependencies": ["permission:input"],
     "contexts": ["blessed_extension"]
   },
   "inputMethodPrivate": {
     "platform": "chromeos",
     "dependencies": ["permission:inputMethodPrivate"],
     "contexts": ["blessed_extension"]
   },
@@ skipping 256 matching lines @@
   },
   "webview": {
     "dependencies": ["permission:webview"],
     "contexts": ["blessed_extension"]
   },
   "windows": {
     "dependencies": ["permission:tabs"],
     "contexts": ["blessed_extension"]
   }
 }