Add WebRTC logging extension API.

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 c5ca17b225a7851e894ad6d89c8ed94e064be631..2b766d6180b8dce9a38db56ab81efd0dd3157bfd 100644
--- a/chrome/common/extensions/api/_permission_features.json
+++ b/chrome/common/extensions/api/_permission_features.json
@@ -672,6 +672,19 @@
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app"]
   },
+  "webrtcLoggingPrivate": [{
+    "channel": "dev",
+    "extension_types": ["extension"],
+    "whitelist": ["80B9DC58E5210749F052F5B4DB239C50CF72AEB6"]
+  },{
+    "channel": "beta",
+    "extension_types": ["extension"],
+    "whitelist": ["80B9DC58E5210749F052F5B4DB239C50CF72AEB6"]
+  },{
+    "channel": "stable",
+    "extension_types": ["extension"],
+    "whitelist": ["80B9DC58E5210749F052F5B4DB239C50CF72AEB6"]
+  }],

[Finnur, 2013/09/04 13:45:56]

I don't think this is correct. There should only be one entry and the 'channel'
specifies how far it should go. 'dev' is appropriate for now. When we are ready
we can change it to 'beta' and then eventually to 'stable'.

[Henrik Grunell, 2013/09/04 13:53:09]

Ah OK. The other with several entries all have different setups I see now. Done.

   "webstorePrivate": {
     "channel": "stable",
     "extension_types": ["extension", "legacy_packaged_app"],