Add SHA1 hash of experience sampling extension to whitelist.

BUG=384635

Review URL: https://codereview.chromium.org/462183002

Cr-Commit-Position: refs/heads/master@{#289694}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@289694 0039d316-1c4b-4281-b951-d872f2087c98

chrome/common/extensions/api/_permission_features.json

@@ -425,7 +425,9 @@
   "experienceSamplingPrivate": {
     "channel": "dev",
     "extension_types": ["extension"],
-    "whitelist": []
+    "whitelist": [
+      "0B5B953E53AC1859AC1DD3F67E115D1A5C2D6123"  // https://crbug.com/384635
+    ]
   },
   "experimental": {
     "channel": "stable",