Add InputEvent and EventPacket types for batched input delivery

content/common/input/input_event_utils.h

+// 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.
+
+#ifndef CONTENT_COMMON_INPUT_INPUT_EVENT_UTILS_H_
+#define CONTENT_COMMON_INPUT_INPUT_EVENT_UTILS_H_
+
+#include "content/common/content_export.h"
+
+namespace IPC {
+class Message;
+}
+
+namespace ui {
+struct LatencyInfo;
+}
+
+namespace WebKit {
+class WebInputEvent;
+}
+
+namespace content {
+
+class EventPacket;
+
+// True of message is of type InputMsg_HandleInputEvent.
+CONTENT_EXPORT bool IsWebInputEventMessage(const IPC::Message& message);
+// |optional_output_is_keyboard_shortcut| may be NULL.
+CONTENT_EXPORT bool CrackWebInputEventMessage(
+    const IPC::Message& message,
+    const WebKit::WebInputEvent** output_event,
+    ui::LatencyInfo* output_latency_info,
+    bool* optional_output_is_keyboard_shortcut);
+
+// True if message is of type InputMsg_HandleEventPacket or
+// InputHostMsg_HandleEventPacket_ACK.
+CONTENT_EXPORT bool IsEventPacketMessage(const IPC::Message& message);
+CONTENT_EXPORT bool CrackEventPacketMessage(
+    const IPC::Message& message,
+    EventPacket* output_packet);
+
+} // namespace content
+
+#endif // CONTENT_COMMON_INPUT_INPUT_EVENT_UTILS_H_