Use MIDIMessageQueue/IsValidWebMIDIData for MIDI byte stream validation

content/browser/renderer_host/media/midi_host.h

Index: content/browser/renderer_host/media/midi_host.h
diff --git a/content/browser/renderer_host/media/midi_host.h b/content/browser/renderer_host/media/midi_host.h
index e3b9df1b6bea56f7bc113c223e48c51d18d3974c..01ac2ca252ee8fcc4c80010982e2fb825a5b4ce1 100644
--- a/content/browser/renderer_host/media/midi_host.h
+++ b/content/browser/renderer_host/media/midi_host.h
@@ -9,6 +9,7 @@
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/scoped_vector.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/browser_message_filter.h"
 #include "content/public/browser/browser_thread.h"
@@ -16,6 +17,7 @@
 
 namespace media {
 class MIDIManager;
+class MIDIMessageQueue;
 }
 
 namespace content {
@@ -63,6 +65,9 @@ class CONTENT_EXPORT MIDIHost
   // OnSendData() will do nothing.
   media::MIDIManager* const midi_manager_;
 
+  // Buffers where data sent from each MIDI input port is stored.
+  ScopedVector<media::MIDIMessageQueue> received_messages_queues_;
+
   // The number of bytes sent to the platform-specific MIDI sending
   // system, but not yet completed.
   size_t sent_bytes_in_flight_;