Initial stub version of Async Clipboard API

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

Index: third_party/WebKit/Source/core/clipboard/ClipboardPromise.h
diff --git a/third_party/WebKit/Source/core/clipboard/ClipboardPromise.h b/third_party/WebKit/Source/core/clipboard/ClipboardPromise.h
new file mode 100644
index 0000000000000000000000000000000000000000..1cfd0e30e973175b3e138bb66cd8b13998b0fa20
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+++ b/third_party/WebKit/Source/core/clipboard/ClipboardPromise.h
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+// 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 ClipboardPromise_h
+#define ClipboardPromise_h
+
+#include "bindings/core/v8/ScriptPromise.h"
+#include "core/CoreExport.h"
+#include "core/dom/ContextLifecycleObserver.h"
+#include "public/platform/WebClipboard.h"
+
+namespace blink {
+
+class DataTransfer;
+class ScriptPromiseResolver;
+
+class ClipboardPromise final
+    : public GarbageCollectedFinalized<ClipboardPromise>,
+      public ContextLifecycleObserver {
+  USING_GARBAGE_COLLECTED_MIXIN(ClipboardPromise);
+  WTF_MAKE_NONCOPYABLE(ClipboardPromise);
+
+ public:
+  virtual ~ClipboardPromise(){};
+
+  static ScriptPromise CreateForRead(ScriptState*);
+  static ScriptPromise CreateForReadText(ScriptState*);
+  static ScriptPromise CreateForWrite(ScriptState*, DataTransfer*);
+  static ScriptPromise CreateForWriteText(ScriptState*, const String&);
+
+  DECLARE_VIRTUAL_TRACE();
+
+ private:
+  ClipboardPromise(ScriptState*);
+
+  WebTaskRunner* GetTaskRunner();
+
+  void HandleRead();
+  void HandleReadText();
+
+  void HandleWrite(DataTransfer*);
+  void HandleWriteText(const String&);
+
+  Member<ScriptPromiseResolver> script_promise_resolver_;
+
+  WebClipboard::Buffer buffer_;
+};
+
+}  // namespace blink
+
+#endif  // ClipboardPromise_h