Use MIDIMessageQueue/IsValidWebMIDIData for MIDI byte stream validation

media/midi/midi_message_util.h

Index: media/midi/midi_message_util.h
diff --git a/media/midi/midi_message_util.h b/media/midi/midi_message_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..dfe66ecfcd32910cd65dc94dc095468980255cc9
--- /dev/null
+++ b/media/midi/midi_message_util.h
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+// 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 MEDIA_MIDI_MIDI_MESSAGE_UTIL_H_
+#define MEDIA_MIDI_MIDI_MESSAGE_UTIL_H_
+
+#include <deque>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "media/base/media_export.h"
+
+namespace media {
+
+// Returns the length of a MIDI message in bytes. Never returns 4 or greater.
+// Returns 0 if |status_byte| is:
+// - not a valid status byte, namely data byte.
+// - the MIDI System Exclusive message.
+// - the End of System Exclusive message.
+MEDIA_EXPORT size_t GetMIDIMessageLength(uint8 status_byte);
+
+}  // namespace media
+
+#endif  // MEDIA_MIDI_MIDI_MESSAGE_UTIL_H_