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..47386ec6afdbc8598ba96cb47efd836ec91eb49a
--- /dev/null
+++ b/content/common/input/event_packet_ack.cc
@@ -0,0 +1,22 @@
+// 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::EventPacketAck(int64 id, const Dispositions& dispositions)
+    : id(id),
+      dispositions(dispositions) {
+  DCHECK(!dispositions.empty());
+}
+
+EventPacketAck::EventPacketAck()
+    : id(0) {}
+
+EventPacketAck::~EventPacketAck() {}
+
+}  // namespace content