Initial stub version of Async Clipboard API

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

Index: third_party/WebKit/Source/core/clipboard/Clipboard.cpp
diff --git a/third_party/WebKit/Source/core/clipboard/Clipboard.cpp b/third_party/WebKit/Source/core/clipboard/Clipboard.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..4e67d3e2b9ebbc66abd1ae257816c5aad3c9aa83
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+++ b/third_party/WebKit/Source/core/clipboard/Clipboard.cpp
@@ -0,0 +1,49 @@
+// 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.
+
+#include "core/clipboard/Clipboard.h"
+
+#include "bindings/core/v8/ScriptPromiseResolver.h"
+#include "core/clipboard/ClipboardAsync.h"
+
+namespace blink {
+
+Clipboard::Clipboard(ExecutionContext* context)
+    : ContextLifecycleObserver(context) {}
+
+ScriptPromise Clipboard::read(ScriptState* scriptState) {
+  ClipboardAsync* async = ClipboardAsync::create(scriptState);
+  return async->scheduleRead();
+}
+
+ScriptPromise Clipboard::readText(ScriptState* scriptState) {
+  ClipboardAsync* async = ClipboardAsync::create(scriptState);
+  return async->scheduleReadText();
+}
+
+ScriptPromise Clipboard::write(ScriptState* scriptState, DataTransfer* data) {
+  ClipboardAsync* async = ClipboardAsync::create(scriptState);
+  return async->scheduleWrite(data);
+}
+
+ScriptPromise Clipboard::writeText(ScriptState* scriptState,
+                                   const String& data) {
+  ClipboardAsync* async = ClipboardAsync::create(scriptState);
+  return async->scheduleWriteText(data);
+}
+
+const AtomicString& Clipboard::interfaceName() const {
+  return EventTargetNames::Clipboard;
+}
+
+ExecutionContext* Clipboard::getExecutionContext() const {
+  return ContextLifecycleObserver::getExecutionContext();
+}
+
+DEFINE_TRACE(Clipboard) {
+  EventTarget::trace(visitor);
+  ContextLifecycleObserver::trace(visitor);
+}
+
+}  // namespace blink