Add Origin Trials Test interface, rather than attaching trials directly to internals.

third_party/WebKit/Source/core/testing/OriginTrialsTest.idl

Index: third_party/WebKit/Source/core/testing/OriginTrialsTest.idl
diff --git a/third_party/WebKit/Source/core/testing/OriginTrialsTest.idl b/third_party/WebKit/Source/core/testing/OriginTrialsTest.idl
new file mode 100644
index 0000000000000000000000000000000000000000..90d17da8fc477b614dc677794c0f352ad5b2aaa6
--- /dev/null
+++ b/third_party/WebKit/Source/core/testing/OriginTrialsTest.idl
@@ -0,0 +1,13 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+[
+] interface OriginTrialsTest {

[haraken, 2016/09/16 13:48:46]

Remove the empty []. (foolip@ is landing a change to forbid it.)

[iclelland, 2016/09/16 14:38:42]

Thanks, done! I saw that this morning when I tried to rebase. 

+    [OriginTrialEnabled=OriginTrialsSampleAPI] readonly attribute boolean normalAttribute;
+    [OriginTrialEnabled=OriginTrialsSampleAPI] static readonly attribute boolean staticAttribute;
+    [CallWith=ScriptState, RaisesException] readonly attribute boolean throwingAttribute;

[chasej, 2016/09/16 15:17:02]

Nit: Maybe add a comment explaining that this throws when trial is not enabled
(i.e. use native enabled check)? I had to look at the .cpp to figure out the
intent.

[iclelland, 2016/09/16 15:59:47]

Done.

+    readonly attribute boolean unconditionalAttribute;
+    [OriginTrialEnabled=OriginTrialsSampleAPI, ImplementedAs=unconditionalAttribute] readonly attribute boolean bindingsTest;
+    [OriginTrialEnabled=OriginTrialsSampleAPI] const unsigned short CONSTANT = 1;
+};