Add whitelist for webcamPrivate

Bug: 891460
Change-Id: Idf387481e050593788a6f2e5139f81bb0d19b641
Reviewed-on: https://chromium-review.googlesource.com/c/1341024Reviewed-by: Toni Baržić <tbarzic@chromium.org>
Commit-Queue: Zachary Kuznia <zork@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609865}

chrome/common/extensions/api/_permission_features.json

@@ -461,7 +461,18 @@
   },
   "webcamPrivate": {
     "channel": "stable",
-    "extension_types": ["extension", "platform_app"]
+    "extension_types": ["extension", "platform_app"],
+    "whitelist": [
+      "E703483CEF33DEC18B4B6DD84B5C776FB9182BDB",  // http://crbug.com/891460
+      "A3BC37E2148AC4E99BE4B16AF9D42DD1E592BBBE",  // http://crbug.com/891460
+      "1C93BD3CF875F4A73C0B2A163BB8FBDA8B8B3D80",  // http://crbug.com/891460
+      "307E96539209F95A1A8740C713E6998A73657D96",  // http://crbug.com/891460
+      "4F25792AF1AA7483936DE29C07806F203C7170A0",  // http://crbug.com/891460
+      "BD8781D757D830FC2E85470A1B6E8A718B7EE0D9",  // http://crbug.com/891460
+      "4AC2B6C63C6480D150DFDA13E4A5956EB1D0DDBB",  // http://crbug.com/891460
+      "81986D4F846CEDDDB962643FA501D1780DD441BB",  // http://crbug.com/891460
+      "A9A9FC0228ADF541F0334F22BEFB8F9C245B21D7"   // http://crbug.com/891460
+    ]
   },
   "networking.castPrivate": {
     "channel": "stable",