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

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

+// 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 OriginTrialsTest_h
+#define OriginTrialsTest_h
+
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "platform/heap/Handle.h"
+
+namespace blink {
+
+class ExceptionState;
+class ScriptState;
+
+// OriginTrialsTest is a very simple interface used for testing
+// origin-trial-enabled features which are attached directly to interfaces at
+// run-time.
+class OriginTrialsTest : public GarbageCollectedFinalized<OriginTrialsTest>, public ScriptWrappable {
+    DEFINE_WRAPPERTYPEINFO();
+public:
+    static OriginTrialsTest* create()
+    {
+        return new OriginTrialsTest();
+    }
+    virtual ~OriginTrialsTest() = default;
+
+    bool normalAttribute();
+    static bool staticAttribute();
+
+    bool throwingAttribute(ScriptState*, ExceptionState&);
+    bool unconditionalAttribute();
+
+    static const unsigned short kConstant = 1;
+
+    DECLARE_TRACE();
+
+private:
+    OriginTrialsTest() = default;
+
+};
+
+} // namespace blink
+
+#endif // OriginTrialsTest_h