Add promise-based addIceCandidate, setLocalDescription and setRemoteDescription to RTCPeerConnection

third_party/WebKit/Source/modules/mediastream/RTCVoidRequestPromiseImpl.h

Index: third_party/WebKit/Source/modules/mediastream/RTCVoidRequestPromiseImpl.h
diff --git a/third_party/WebKit/Source/modules/mediastream/RTCVoidRequestPromiseImpl.h b/third_party/WebKit/Source/modules/mediastream/RTCVoidRequestPromiseImpl.h
new file mode 100644
index 0000000000000000000000000000000000000000..619c7259b33ac8773859805a6db15fe01caf0467
--- /dev/null
+++ b/third_party/WebKit/Source/modules/mediastream/RTCVoidRequestPromiseImpl.h
@@ -0,0 +1,39 @@
+// Copyright 2016 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 RTCVoidRequestPromiseImpl_h
+#define RTCVoidRequestPromiseImpl_h
+
+#include "platform/mediastream/RTCVoidRequest.h"
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+class ScriptPromiseResolver;
+class RTCPeerConnection;
+
+class RTCVoidRequestPromiseImpl final : public RTCVoidRequest {
+public:
+    static RTCVoidRequestPromiseImpl* create(RTCPeerConnection*, ScriptPromiseResolver*, const String& errorName);
+    ~RTCVoidRequestPromiseImpl() override;
+
+    // RTCVoidRequest
+    void requestSucceeded() override;
+    void requestFailed(const String& error) override;
+
+    DECLARE_VIRTUAL_TRACE();
+
+private:
+    RTCVoidRequestPromiseImpl(RTCPeerConnection*, ScriptPromiseResolver*, const String& errorName);
+
+    void clear();
+
+    Member<ScriptPromiseResolver> m_resolver;
+    String m_errorName;
+    Member<RTCPeerConnection> m_requester;
+};
+
+} // namespace blink
+
+#endif // RTCVoidRequestPromiseImpl_h