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

third_party/WebKit/Source/core/origin_trials/testing/WorkerInternalsFrobulate.h

Index: third_party/WebKit/Source/core/origin_trials/testing/WorkerInternalsFrobulate.h
diff --git a/third_party/WebKit/Source/core/origin_trials/testing/WorkerInternalsFrobulate.h b/third_party/WebKit/Source/core/origin_trials/testing/WorkerInternalsFrobulate.h
deleted file mode 100644
index 495d461b39be7016da529e293387b5fd79624cb9..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/core/origin_trials/testing/WorkerInternalsFrobulate.h
+++ /dev/null
@@ -1,23 +0,0 @@
-// 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.
-
-#ifndef WorkerInternalsFrobulate_h
-#define WorkerInternalsFrobulate_h
-
-#include "wtf/Allocator.h"
-
-namespace blink {
-
-class WorkerInternals;
-
-class WorkerInternalsFrobulate final {
-    STATIC_ONLY(WorkerInternalsFrobulate);
-public:
-    static const unsigned short kFrobulateConst = 1;
-    static bool frobulate(WorkerInternals&) { return true; }
-};
-
-} // namespace blink
-
-#endif // WorkerInternalsFrobulate_h