Bug 1523562 [wpt PR 14983] - Make webrtc-stats idlharness.js test depend on webrtc, a=testonly

Automatic update from web-platform-tests
Make webrtc-stats idlharness.js test depend on webrtc (#14983)

Required for https://github.com/web-platform-tests/wpt/pull/14960.
--

wpt-commits: 40b0c100e15c98a91bf8804b31e0f41e8bdbaab6
wpt-pr: 14983

testing/web-platform/tests/webrtc-stats/idlharness.window.js

@@ -7,7 +7,7 @@
 
 idl_test(
   ['webrtc-stats'],
-  [], // No deps
+  ['webrtc'],
   idl_array => {
     // No interfaces to test
   }