Add Chrome Remote Desktop to approved extensions list of metrics-private 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 669 matching lines @@
       "B9EF10DDFEA11EF77873CC5009809E5037FC4C7A",  // Google input tools
       "7D7A4B147FE39908A5AF13F85E38989C54BBE41C",  // http://crbug.com/374955
       "0EEDFC0EED87871237213F34EBC7B4982A195C95",  // http://crbug.com/374955
       "D2DAA9362153E8A5E3CF593E6DF4666421ABAD21",  // http://crbug.com/374965
       "D7986543275120831B39EF28D1327552FC343960",  // http://crbug.com/378067
       "A291B26E088FA6BA53FFD72F0916F06EBA7C585A",  // http://crbug.com/378067
       "62CCAAD339E6451BBF97C4BBDF758E934A05AD0B",  // Hotword triggering
       "07BD6A765FFC289FF755D7CAB2893A40EC337FEC",  // http://crbug.com/456214
       "896B85CC7E913E11C34892C1425A093C0701D386",  // http://crbug.com/456214
       "11A01C82EF355E674E4F9728A801F5C3CB40D83F",  // http://crbug.com/456214
-      "F410C88469990EE7947450311D24B8AF2ADB2595"   // http://crbug.com/456214
+      "F410C88469990EE7947450311D24B8AF2ADB2595",  // http://crbug.com/456214
+      "9E527CDA9D7C50844E8A5DB964A54A640AE48F98"   // Chrome Remote Desktop

[Sergey Ulanov, 2015/06/15 23:31:06]

Which app is this? I think ideally we want to add all version of the webapp
here, not only the official release. See list of all app ids for remoting in 
remoting/host/setup/com.google.chrome.remote_desktop.json.jinja2

     ]
   },
   "mdns": [{
     "channel": "stable",
     "extension_types": ["extension"],
     "whitelist": [
       "63ED55E43214C211F82122ED56407FF1A807F2A3",  // Dev
       "FA01E0B81978950F2BC5A50512FD769725F57510",  // Beta
       "B11A93E7E5B541F8010245EBDE2C74647D6C14B9",  // Canary
       "F155646B5D1CA545F7E1E4E20D573DFDD44C2540",  // Google Cast Beta
@@ skipping 328 matching lines @@
     "channel": "stable",
     "extension_types": ["platform_app"],
     "platforms": ["chromeos"],
     "whitelist": [
       "A948368FC53BE437A55FEB414106E207925482F5",  // Files app
       "8C726564C6DBE7380BAB388DE6CC7EC93EB44B06",  // Video player
       "5065C83E84321221675D20FBE4DC43C655CC8C6F"   // Files app tests
     ]
   }
 }