MediaPerceptionPrivate IDL and skeleton.

extensions/common/api/_permission_features.json

Index: extensions/common/api/_permission_features.json
diff --git a/extensions/common/api/_permission_features.json b/extensions/common/api/_permission_features.json
index b64d0c40eb70d26633afef2ac67fdca074b32d78..5cd8a8ad9865b25d3d74551379e2c3e0269c8980 100644
--- a/extensions/common/api/_permission_features.json
+++ b/extensions/common/api/_permission_features.json
@@ -249,6 +249,22 @@
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app", "platform_app"]
   },
+  "mediaPerceptionPrivate": {
+    "channel": "trunk",
+    "extension_types": ["extension", "legacy_packaged_app", "platform_app"],
+    "platforms": ["chromeos"],
+    "whitelist": [
+      "E703483CEF33DEC18B4B6DD84B5C776FB9182BDB",  // http://crbug.com/720495
+      "A3BC37E2148AC4E99BE4B16AF9D42DD1E592BBBE",  // http://crbug.com/720495
+      "1C93BD3CF875F4A73C0B2A163BB8FBDA8B8B3D80",  // http://crbug.com/720495
+      "307E96539209F95A1A8740C713E6998A73657D96",  // http://crbug.com/720495
+      "4F25792AF1AA7483936DE29C07806F203C7170A0",  // http://crbug.com/720495
+      "BD8781D757D830FC2E85470A1B6E8A718B7EE0D9",  // http://crbug.com/720495
+      "4AC2B6C63C6480D150DFDA13E4A5956EB1D0DDBB",  // http://crbug.com/720495
+      "81986D4F846CEDDDB962643FA501D1780DD441BB",  // http://crbug.com/720495
+      "3970B660353CA07962DAD1A5C1B75A7B87835943"   // http://crbug.com/720495
+    ]
+  },
   "metricsPrivate": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app", "platform_app"],
@@ -554,8 +570,8 @@
       "307E96539209F95A1A8740C713E6998A73657D96",  // Dev external hotrod app
       "4F25792AF1AA7483936DE29C07806F203C7170A0",  // Stable internal hotrod app
       "BD8781D757D830FC2E85470A1B6E8A718B7EE0D9",  // Beta internal hotrod app
-      "4AC2B6C63C6480D150DFDA13E4A5956EB1D0DDBB",  // Alpha external hotrod app
-      "81986D4F846CEDDDB962643FA501D1780DD441BB"   // Dev external hotrod app
+      "4AC2B6C63C6480D150DFDA13E4A5956EB1D0DDBB",  // Alpha internal hotrod app
+      "81986D4F846CEDDDB962643FA501D1780DD441BB"   // Dev internal hotrod app
     ]
   },
   "vpnProvider": {