Add code to load Hangout Services as a component extension.

chrome/common/extensions/api/_permission_features.json

Index: chrome/common/extensions/api/_permission_features.json
diff --git a/chrome/common/extensions/api/_permission_features.json b/chrome/common/extensions/api/_permission_features.json
index 417e9bc203c7f886ec9de4bd225d624974b853d2..81aa2d5024b51cb05f3f1542f97006a8239f73e2 100644
--- a/chrome/common/extensions/api/_permission_features.json
+++ b/chrome/common/extensions/api/_permission_features.json
@@ -239,7 +239,11 @@
     {
       "channel": "stable",
       "extension_types": ["extension", "platform_app"],
-      "whitelist": ["80B9DC58E5210749F052F5B4DB239C50CF72AEB6"]
+      "whitelist": [
+        "80B9DC58E5210749F052F5B4DB239C50CF72AEB6",
+        // Hangout Services component extension.
+        "nkeimhogjdpnpccoofpliimaahmaaome"
+      ]
     }
   ],
   "dns": [
@@ -685,10 +689,18 @@
     "extension_types": ["extension", "legacy_packaged_app", "platform_app"],
     "min_manifest_version": 2
   },
-  "system.cpu": {
+  "system.cpu": [{
     "channel": "dev",
     "extension_types": ["extension", "legacy_packaged_app", "platform_app"]
-  },
+  }, {
+    "channel": "stable",
+    "extension_types": ["extension"],
+    "whitelist": [
+      "80B9DC58E5210749F052F5B4DB239C50CF72AEB6",
+      // Hangout Services component extension.
+      "nkeimhogjdpnpccoofpliimaahmaaome"
+    ]
+  }],
   "system.memory": {
     "channel": "dev",
     "extension_types": ["extension", "legacy_packaged_app", "platform_app"]
@@ -792,13 +804,20 @@
     "extension_types": ["extension"],
     "whitelist": [
       "80B9DC58E5210749F052F5B4DB239C50CF72AEB6",
-      "knldjmfmopnpolahpmmgbagdohdnhkik"  // Extension used for API test.
+      // Hangout Services component extension.
+      "nkeimhogjdpnpccoofpliimaahmaaome",
+      // Extension used for API test.
+      "knldjmfmopnpolahpmmgbagdohdnhkik"
     ]
   },
   "webrtcLoggingPrivate": {
     "channel": "stable",
     "extension_types": ["extension"],
-    "whitelist": ["80B9DC58E5210749F052F5B4DB239C50CF72AEB6"]
+    "whitelist": [
+      "80B9DC58E5210749F052F5B4DB239C50CF72AEB6",
+      // Hangout Services component extension.
+      "nkeimhogjdpnpccoofpliimaahmaaome"
+    ]
   },
   "webstorePrivate": {
     "channel": "stable",