Web MIDI: implement implicit open() on send() and setOnmidimessage()

LayoutTests/webmidi/open_close-expected.txt

Index: LayoutTests/webmidi/open_close-expected.txt
diff --git a/LayoutTests/webmidi/open_close-expected.txt b/LayoutTests/webmidi/open_close-expected.txt
deleted file mode 100644
index 56337609a98edcebb3f51dc79bb82288fd700c01..0000000000000000000000000000000000000000
--- a/LayoutTests/webmidi/open_close-expected.txt
+++ /dev/null
@@ -1,62 +0,0 @@
-Tests MIDIPort.open and MIDIPort.close.
-
-On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
-
-
-PASS requestMIDIAccess() succeeded with access [object MIDIAccess].
-Check state transition for close on closed state.
-- check initial state.
-PASS port.connection is "closed"
-- check callback arguments.
-PASS callback is called with port [object MIDIInput].
-PASS callbackport.id is "MockInputID"
-PASS callbackport.connection is "closed"
-- check final state.
-PASS port.connection is "closed"
-Check state transition for open on closed state.
-- check initial state.
-PASS port.connection is "closed"
-- check port handler.
-PASS handler is called with port [object MIDIInput].
-PASS eventport.id is "MockInputID"
-PASS eventport.connection is "open"
-- check access handler.
-PASS handler is called with port [object MIDIInput].
-PASS eventport.id is "MockInputID"
-PASS eventport.connection is "open"
-- check callback arguments.
-PASS callback is called with port [object MIDIInput].
-PASS callbackport.id is "MockInputID"
-PASS callbackport.connection is "open"
-- check final state.
-PASS port.connection is "open"
-Check state transition for open on open state.
-- check initial state.
-PASS port.connection is "open"
-- check callback arguments.
-PASS callback is called with port [object MIDIInput].
-PASS callbackport.id is "MockInputID"
-PASS callbackport.connection is "open"
-- check final state.
-PASS port.connection is "open"
-Check state transition for close on open state.
-- check initial state.
-PASS port.connection is "open"
-- check port handler.
-PASS handler is called with port [object MIDIInput].
-PASS eventport.id is "MockInputID"
-PASS eventport.connection is "closed"
-- check access handler.
-PASS handler is called with port [object MIDIInput].
-PASS eventport.id is "MockInputID"
-PASS eventport.connection is "closed"
-- check callback arguments.
-PASS callback is called with port [object MIDIInput].
-PASS callbackport.id is "MockInputID"
-PASS callbackport.connection is "closed"
-- check final state.
-PASS port.connection is "closed"
-PASS successfullyParsed is true
-
-TEST COMPLETE
-