Web MIDI: fix a regression of r430234

third_party/WebKit/LayoutTests/webmidi/requestmidiaccess-expected.txt

 Tests navigator.requestMIDIAccess.
 
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
 PASS PermissionsHelper.setPermission is defined.
 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.id is "MockInputID-0"
 PASS input.manufacturer is "MockInputManufacturer"
 PASS input.name is "MockInputName"
 PASS input.version is "MockInputVersion"
 PASS input.state is "connected"
 PASS input.type is "input"
 for (var input of inputs.keys())
-PASS inputKey is "MockInputID"
+PASS inputKey is "MockInputID-0"
 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 inputs.has('MockInputID') is true
-PASS inputs.has('MockOutputID') is false
-PASS inputs.get('MockInputID') is input
-PASS inputs.get('MockOutputID') is undefined.
+PASS inputs.has('MockInputID-0') is true
+PASS inputs.has('MockOutputID-0') is false
+PASS inputs.get('MockInputID-0') is input
+PASS inputs.get('MockOutputID-0') is undefined.
 inputs.forEach(...)
 PASS forEachInput is input
 PASS forEachInputKey is inputKey
 PASS forEachMap is inputs
 for (var output of outputs.values())
-PASS output.id is "MockOutputID"
+PASS output.id is "MockOutputID-0"
 PASS output.manufacturer is "MockOutputManufacturer"
 PASS output.name is "MockOutputName"
 PASS output.version is "MockOutputVersion"
 PASS output.state is "connected"
 PASS output.type is "output"
 for (var output of outputs.keys())
-PASS outputKey is "MockOutputID"
+PASS outputKey is "MockOutputID-0"
 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 outputs.has('MockOutputID') is true
-PASS outputs.has('MockInputID') is false
-PASS outputs.get('MockOutputID') is output
-PASS outputs.get('MockInputID') is undefined.
+PASS outputs.has('MockOutputID-0') is true
+PASS outputs.has('MockInputID-0') is false
+PASS outputs.get('MockOutputID-0') is output
+PASS outputs.get('MockInputID-0') is undefined.
 outputs.forEach(...)
 PASS forEachOutput is output
 PASS forEachOutputKey is outputKey
 PASS forEachMap is outputs
 PASS a note on message is sent without timestamp
 PASS a note on message is sent with timestamp
 PASS output.send([0xfff, 0x45, 0x7f]) threw exception TypeError: Failed to execute 'send' on 'MIDIOutput': The value at index 0 (4095) is greater than 0xFF..
 PASS output.send([0xf0, 0x45, 0xf7]) threw exception InvalidAccessError: Failed to execute 'send' on 'MIDIOutput': System exclusive message is not allowed at index 0 (240)..
 PASS requestMIDIAccess() was correctly blocked for System Exclusive access with error SecurityError: An attempt was made to break through the security policy of the user agent..
 PASS successfullyParsed is true
 
 TEST COMPLETE