Bug 1484793 [wpt PR 12572] - Update wpt metadata, a=testonly

wpt-pr: 12572
wpt-type: metadata

testing/web-platform/meta/input-events/idlharness.window.js.ini

@@ -0,0 +1,19 @@
+[idlharness.window.html]
+  [InputEvent interface: attribute inputType]
+    expected: FAIL
+
+  [InputEvent interface: new InputEvent("foo") must inherit property "inputType" with the proper type]
+    expected: FAIL
+
+  [InputEvent interface: new InputEvent("foo") must inherit property "dataTransfer" with the proper type]
+    expected: FAIL
+
+  [InputEvent interface: attribute dataTransfer]
+    expected: FAIL
+
+  [InputEvent interface: new InputEvent("foo") must inherit property "getTargetRanges()" with the proper type]
+    expected: FAIL
+
+  [InputEvent interface: operation getTargetRanges()]
+    expected: FAIL
+