MIDI{Input, Output}Map[Symbol.iterator]() should return entries.

LayoutTests/webmidi/requestmidiaccess-expected.txt

Index: LayoutTests/webmidi/requestmidiaccess-expected.txt
diff --git a/LayoutTests/webmidi/requestmidiaccess-expected.txt b/LayoutTests/webmidi/requestmidiaccess-expected.txt
index f34ca14ce41b97e1a9e10a881e3b51d75a518861..28540a0679e4394dd9c40907b0a8eeb613eca2ae 100644
--- a/LayoutTests/webmidi/requestmidiaccess-expected.txt
+++ b/LayoutTests/webmidi/requestmidiaccess-expected.txt
@@ -7,26 +7,37 @@ PASS requestMIDIAccess() succeeded with access [object MIDIAccess].
 PASS access.sysexEnabled is defined.
 PASS access.sysexEnabled is false
 PASS access.inputs.size is 1
+PASS access.outputs.size is 1
+for (var input of inputs.values())
 PASS input.id is "MockInputID"
 PASS input.manufacturer is "MockInputManufacturer"
 PASS input.name is "MockInputName"
 PASS input.version is "MockInputVersion"
+for (var input of inputs.keys())
 PASS inputKey is "MockInputID"
+for (var input of inputs.entries())
+PASS entry[0] is inputKey
+PASS entry[1] is input
+for (var input of inputs)
 PASS entry[0] is inputKey
 PASS entry[1] is input
-PASS inputValue is input
 PASS inputs.has('MockInputID') is true
 PASS inputs.has('MockOutputID') is false
 PASS inputs.get('MockInputID') is input
 PASS inputs.get('MockOutputID') is undefined.
+for (var output of outputs.values())
 PASS output.id is "MockOutputID"
 PASS output.manufacturer is "MockOutputManufacturer"
 PASS output.name is "MockOutputName"
 PASS output.version is "MockOutputVersion"
+for (var output of outputs.keys())
 PASS outputKey is "MockOutputID"
+for (var output of outputs.entries())
+PASS entry[0] is outputKey
+PASS entry[1] is output
+for (var output of outputs)
 PASS entry[0] is outputKey
 PASS entry[1] is output
-PASS outputValue is output
 PASS outputs.has('MockOutputID') is true
 PASS outputs.has('MockInputID') is false
 PASS outputs.get('MockOutputID') is output