Initial chrome.mdns API.

chrome/common/extensions/api/_manifest_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.
 
 {
   "app": {
     "channel": "stable",
@@ skipping 263 matching lines @@
     "extension_types": [
       "extension", "legacy_packaged_app", "hosted_app", "platform_app"
     ]
   },
   "options_page": {
     "channel": "stable",
     "extension_types": [
       "extension", "legacy_packaged_app", "hosted_app"
     ]
   },
+  "mdns_service_types": {
+    "channel": "stable",
+    "extension_types": ["extension"],
+    "whitelist": [
+      "enhhojjnijigcajfphajepfemndkmdlo",  // Dev
+      "pkedcjkdefgpdelpbcmbmeomcjbeemfm",  // Trusted Tester
+      "fmfcbgogabcbclcofgocippekhfcmgfj",  // Staging
+      "hfaagokkkhdbgiakmmlclaapfelnkoah",  // Canary
+      "F155646B5D1CA545F7E1E4E20D573DFDD44C2540",  // Trusted Tester (public)
+      "16CA7A47AAE4BE49B1E75A6B960C3875E945B264"   // Release
+    ]
+  },
   "page_action": {
     "channel": "stable",
     "extension_types": ["extension"]
   },
   "page_actions": {
     "channel": "stable",
     "extension_types": ["extension"],
     "max_manifest_version": 1
   },
   "permissions": {
@@ skipping 69 matching lines @@
     "channel": "stable",
     "extension_types": "all"
   },
   "web_accessible_resources": {
     "channel": "stable",
     "extension_types": [
       "extension", "legacy_packaged_app", "hosted_app"
     ]
   }
 }