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..98b0ac9c299a0d5146ba016c4f8e3696f734c63c
--- /dev/null
+++ b/third_party/WebKit/Source/core/clipboard/Clipboard.cpp
@@ -0,0 +1,45 @@
+// 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/ClipboardPromise.h"
+
+namespace blink {
+
+Clipboard::Clipboard(ExecutionContext* context)
+    : ContextLifecycleObserver(context) {}
+
+ScriptPromise Clipboard::read(ScriptState* script_state) {
+  return ClipboardPromise::CreateForRead(script_state);
+}
+
+ScriptPromise Clipboard::readText(ScriptState* script_state) {
+  return ClipboardPromise::CreateForReadText(script_state);
+}
+
+ScriptPromise Clipboard::write(ScriptState* script_state, DataTransfer* data) {
+  return ClipboardPromise::CreateForWrite(script_state, data);
+}
+
+ScriptPromise Clipboard::writeText(ScriptState* script_state,
+                                   const String& data) {
+  return ClipboardPromise::CreateForWriteText(script_state, 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