Add identity.email permission for apps and extensions

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 490 matching lines @@
     "extension_types": ["extension"],
     "whitelist": [
       "8CE39F175D076AD6BDF7CBF418F2409558B367E3",  // hotword_helper
       "09FDCB5851B8F3378DB630D06E316076E89C95A6"   // hotword nacl
     ]
   },
   "identity": {
     "channel": "stable",
     "extension_types": ["extension", "platform_app"]
   },
+  "identity.email": {
+    "channel": "dev",
+    "extension_types": ["extension", "platform_app"]
+  },
   "identityPrivate": {
     "channel": "stable",
     "extension_types": [
       "legacy_packaged_app", "platform_app"
     ],
     "location": "component"
   },
   "idltest": {
     "channel": "trunk",
     "extension_types": ["extension"]
@@ skipping 520 matching lines @@
     // Only allowed for whitelisted extensions until all the caveats are
     // addressed. Tracked in crbug/285151.
     "channel": "stable",
     "extension_types": ["extension"],
     "location": "component",
     "whitelist": [
       "D519188F86D9ACCEE0412007B227D9936EB9676B"  // GAIA Component Extension
     ]
   }]
 }