Bug 1428918 - Enable Web Authentication in Nightly r=keeler,smaug

In advance of enabling Web Authentication in Firefox 60 [1], let's turn it on
for Nightly users.

[1] https://groups.google.com/forum/#!msg/mozilla.dev.platform/tsevyqfBHLE/lccldWNNBwAJ

MozReview-Commit-ID: ALyjBwojKtA

--HG--
extra : rebase_source : c51aef6bf12e1e26faa3d86269132eef7057c889

dom/tests/mochitest/general/test_interfaces.js

@@ -144,6 +144,12 @@ var interfaceNamesInGlobalScope =
     "AudioScheduledSourceNode",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "AudioStreamTrack",
+// IMPORTANT: Do not change this list without review from a DOM peer!
+    {name: "AuthenticatorAssertionResponse", isSecureContext:true, nightly: true},
+// IMPORTANT: Do not change this list without review from a DOM peer!
+    {name: "AuthenticatorAttestationResponse", isSecureContext:true, nightly: true},
+// IMPORTANT: Do not change this list without review from a DOM peer!
+    {name: "AuthenticatorResponse", isSecureContext:true, nightly: true},
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "BarProp",
 // IMPORTANT: Do not change this list without review from a DOM peer!
@@ -200,6 +206,10 @@ var interfaceNamesInGlobalScope =
     "ConstantSourceNode",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "ConvolverNode",
+// IMPORTANT: Do not change this list without review from a DOM peer!
+    {name: "Credential", isSecureContext:true, nightly: true},
+// IMPORTANT: Do not change this list without review from a DOM peer!
+    {name: "CredentialsContainer", isSecureContext:true, nightly: true},
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "Crypto",
 // IMPORTANT: Do not change this list without review from a DOM peer!
@@ -772,6 +782,8 @@ var interfaceNamesInGlobalScope =
     "ProcessingInstruction",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "ProgressEvent",
+// IMPORTANT: Do not change this list without review from a DOM peer!
+    {name: "PublicKeyCredential", isSecureContext:true, nightly: true},
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "PushManager",
 // IMPORTANT: Do not change this list without review from a DOM peer!

security/manager/ssl/security-prefs.js

@@ -115,7 +115,11 @@ pref("security.pki.certificate_transparency.mode", 0);
 
 // Hardware Origin-bound Second Factor Support
 pref("security.webauth.u2f", false);
+#ifdef RELEASE_OR_BETA
 pref("security.webauth.webauthn", false);
+#else
+pref("security.webauth.webauthn", true);
+#endif
 // Only one of "enable_softtoken" and "enable_usbtoken" can be true
 // at a time.
 pref("security.webauth.webauthn_enable_softtoken", false);