Reland: Web MIDI: use mojom::blink::PermissionService directly to ask permission

third_party/WebKit/LayoutTests/webmidi/loopback-receive.html

Index: third_party/WebKit/LayoutTests/webmidi/loopback-receive.html
diff --git a/third_party/WebKit/LayoutTests/webmidi/loopback-receive.html b/third_party/WebKit/LayoutTests/webmidi/loopback-receive.html
index 9728155a3a70d1aa81c44e2be35522c4705aa1d1..93828bafdf40bb4d5bee7f639acb07dd96db7522 100644
--- a/third_party/WebKit/LayoutTests/webmidi/loopback-receive.html
+++ b/third_party/WebKit/LayoutTests/webmidi/loopback-receive.html
@@ -71,7 +71,8 @@ function test(useAddEventListener) {
     });
 }
 
-PermissionsHelper.setPermission('midi-sysex', 'granted').then(function() {
+Promise.all([PermissionsHelper.setPermission('midi', 'granted'),
+             PermissionsHelper.setPermission('midi-sysex', 'granted')]).then(function() {
   test(false).then(test.bind(null, true)).then(finishJSTest, finishJSTest);
 });