Initial stub version of Async Clipboard API

third_party/WebKit/Source/core/clipboard/ClipboardPromise.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 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&);
+
+  // ContextLifecycleObserver
+  void ContextDestroyed(ExecutionContext*) override;
+
+  DECLARE_VIRTUAL_TRACE();
+
+ private:
+  ClipboardPromise(ScriptState*);
+
+  WebTaskRunner* GetTaskRunner();
+
+  void HandleRead();
+  void HandleReadText();
+
+  void HandleWrite(DataTransfer*);
+  void HandleWriteText(const String&);
+
+  Member<ScriptPromiseResolver> scriptPromiseResolver_;
+
+  WebClipboard::Buffer buffer_;
+};
+
+}  // namespace blink
+
+#endif  // ClipboardPromise_h