Use MIDIMessageQueue/IsValidWebMIDIData for MIDI byte stream validation

media/midi/midi_message_util.cc

Index: media/midi/midi_message_util.cc
diff --git a/media/midi/midi_message_util.cc b/media/midi/midi_message_util.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e4e2b62426284ef8b2c26365a92bcb854e8a0061
--- /dev/null
+++ b/media/midi/midi_message_util.cc
@@ -0,0 +1,34 @@
+// 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 "media/midi/midi_message_util.h"
+
+namespace media {
+
+size_t GetMIDIMessageLength(uint8 status_byte) {
+  if (status_byte < 0x80)
+    return 0;
+  if (0x80 <= status_byte && status_byte <= 0xbf)
+    return 3;
+  if (0xc0 <= status_byte && status_byte <= 0xdf)
+    return 2;
+  if (0xe0 <= status_byte && status_byte <= 0xef)
+    return 3;
+  if (status_byte == 0xf0)
+    return 0;
+  if (status_byte == 0xf1)
+    return 2;
+  if (status_byte == 0xf2)
+    return 3;
+  if (status_byte == 0xf3)
+    return 2;
+  if (0xf4 <= status_byte && status_byte <= 0xf6)
+    return 1;
+  if (status_byte == 0xf7)
+    return 0;
+  // 0xf8 <= status_byte && status_byte <= 0xff
+  return 1;
+}
+
+}  // namespace media