Add InputEvent and EventPacket types for batched input delivery

content/common/input/event_packet_ack.cc

Index: content/common/input/event_packet_ack.cc
diff --git a/content/common/input/event_packet_ack.cc b/content/common/input/event_packet_ack.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b49ba4529800734a52ea0e2f7ac4f172b28e1697
--- /dev/null
+++ b/content/common/input/event_packet_ack.cc
@@ -0,0 +1,21 @@
+// 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_ack.h"
+
+#include "content/common/input/event_packet.h"
+
+namespace content {
+
+EventPacketAck(const EventPacket& packet)
+    : id(packet.id),
+      event_states(packet.event_states) {}
+
+EventPacketAck() : id(0) {}
+
+EventPacket::~EventPacketAck() {}
+
+} // namespace content
+
+#endif // CONTENT_COMMON_INPUT_EVENT_PACKET_H_