Add InputEvent and EventPacket types for batched input delivery

content/common/input/event_packet.cc

+// Copyright (c) 2013 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 "content/common/input/event_packet_test.h"
+
+EventPacket::EventPacket() {}
+
+EventPacket::~EventPacket() {}
+
+void EventPacket::AddEvent(scoped_ptr<InputEvent> event,
+                           InputEventState state) {
+    DCHECK(events.size() == states.size());
+    events.push_back(event.release());
+    states.push_back(state);
+}
+
+} // namespace content
+
+#endif // CONTENT_COMMON_INPUT_EVENT_PACKET_H_