[ABANDONED] [WebMIDI] Support the legacy MIDIAccess port API.

LayoutTests/webmidi/legacy-ports-expected.txt

Index: LayoutTests/webmidi/legacy-ports-expected.txt
diff --git a/LayoutTests/webmidi/legacy-ports-expected.txt b/LayoutTests/webmidi/legacy-ports-expected.txt
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+Tests the legacy MIDI port API support.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS typeof(access.inputs) is "function"
+PASS typeof(access.outputs) is "function"
+PASS inputs.length is 1
+PASS inputs[0].id is "MockInputID"
+PASS inputs[0].manufacturer is "MockInputManufacturer"
+PASS inputs[0].name is "MockInputName"
+PASS inputs[0].version is "MockInputVersion"
+PASS outputs[0].id is "MockOutputID"
+PASS outputs[0].manufacturer is "MockOutputManufacturer"
+PASS outputs[0].name is "MockOutputName"
+PASS outputs[0].version is "MockOutputVersion"
+PASS successfullyParsed is true
+
+TEST COMPLETE
+