Initial stub version of Async Clipboard API

third_party/WebKit/Source/core/clipboard/Clipboard.h

+// Copyright 2017 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 Clipboard_h
+#define Clipboard_h
+
+#include "bindings/core/v8/ScriptPromise.h"
+#include "core/dom/ContextLifecycleObserver.h"
+#include "core/events/EventTarget.h"
+#include "platform/wtf/Noncopyable.h"
+
+namespace blink {
+
+class DataTransfer;
+class ScriptState;
+
+class Clipboard : public EventTargetWithInlineData,
+                  public ContextLifecycleObserver {
+  USING_GARBAGE_COLLECTED_MIXIN(Clipboard);
+  DEFINE_WRAPPERTYPEINFO();
+  WTF_MAKE_NONCOPYABLE(Clipboard);
+
+ public:
+  explicit Clipboard(ExecutionContext*);
+
+  ScriptPromise read(ScriptState*);
+  ScriptPromise readText(ScriptState*);
+
+  ScriptPromise write(ScriptState*, DataTransfer*);
+  ScriptPromise writeText(ScriptState*, const String&);
+
+  // EventTarget
+  const AtomicString& InterfaceName() const override;
+  // ContextLifecycleObserver

[dcheng, 2017/06/06 23:33:38]

Nit: remove this comment, the requirement to override it actually comes from
EventTarget

[garykac, 2017/06/09 20:38:59]

Done.

+  ExecutionContext* GetExecutionContext() const override;
+
+  DECLARE_VIRTUAL_TRACE();
+};
+
+}  // namespace blink
+
+#endif  // Clipboard_h