Deleting the copresence API.

chrome/common/extensions/api/_permission_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.
 
 // This features file defines permissions for extension APIs implemented
 // under src/chrome.
 // See extensions/common/features/* to understand this file, in particular
 // feature.h, simple_feature.h, and base_feature_provider.h.
 
 // To add a new whitelisted ID, SHA-1 it and force it to uppercase. In Bash:
@@ skipping 185 matching lines @@
     "extension_types": ["extension", "legacy_packaged_app"]
   },
   "contextMenus": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app", "platform_app"]
   },
   "cookies": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app"]
   },
-  "copresence": [
-    {
-      "channel": "dev",
-      "extension_types": ["extension", "platform_app"]
-    },
-    {
-      "channel": "stable",
-      "extension_types": ["extension", "platform_app"],
-      "whitelist": [
-        "AFA728615D3A82D4017BDECEE86978543194D198",  // http://crbug.com/387999
-        "0C0426C12F94156F330FFAF346A976BA8878DE78",  // http://crbug.com/387999
-        "1C93BD3CF875F4A73C0B2A163BB8FBDA8B8B3D80",  // http://crbug.com/389230
-        "A3BC37E2148AC4E99BE4B16AF9D42DD1E592BBBE",  // http://crbug.com/389230
-        "E703483CEF33DEC18B4B6DD84B5C776FB9182BDB",  // http://crbug.com/389230
-        "307E96539209F95A1A8740C713E6998A73657D96",  // http://crbug.com/389230
-        "4F25792AF1AA7483936DE29C07806F203C7170A0",  // http://crbug.com/407693
-        "BD8781D757D830FC2E85470A1B6E8A718B7EE0D9",  // http://crbug.com/407693
-        "4AC2B6C63C6480D150DFDA13E4A5956EB1D0DDBB",  // http://crbug.com/407693
-        "81986D4F846CEDDDB962643FA501D1780DD441BB",  // http://crbug.com/407693
-        "FF78670081967CE21DB86A04AD94A0498F01E20A",  // http://crbug.com/409192
-        "05EBA3051DFCA6AF17070AEE5FE8C66322FF4738",  // http://crbug.com/431978
-        "11B478CEC461C766A2DC1E5BEEB7970AE06DC9C2",  // http://crbug.com/458218
-        "0EFB879311E9EFBB7C45251F89EC655711B1F6ED",  // http://crbug.com/458218
-        "9193D3A51E2FE33B496CDA53EA330423166E7F02",  // http://crbug.com/458218
-        "F9119B8B18C7C82B51E7BC6FF816B694F2EC3E89"   // http://crbug.com/458218
-      ]
-    }
-  ],
   "copresencePrivate": {
     "channel": "stable",
     "extension_types": ["extension"],
     "location": "component",
     "whitelist": [
       "AFA728615D3A82D4017BDECEE86978543194D198"  // Whispernet Proxy
     ]
   },
   "cryptotokenPrivate": {
     "channel": "stable",
@@ skipping 796 matching lines @@
     "channel": "stable",
     "extension_types": ["platform_app"],
     "platforms": ["chromeos"],
     "whitelist": [
       "A948368FC53BE437A55FEB414106E207925482F5",  // Files app
       "8C726564C6DBE7380BAB388DE6CC7EC93EB44B06",  // Video player
       "5065C83E84321221675D20FBE4DC43C655CC8C6F"   // Files app tests
     ]
   }
 }