Bug 1503419 [wpt PR 13795] - Enable unified plan by default for Chrom…

…e Dev, a=testonly

Automatic update from web-platform-testsEnable unified plan by default for Chrome Dev (#13795)

As documented in https://webrtc.org/web-apis/chrome/unified-plan/.

The plan is to enable this by default in Chrome 72, which is the current Chrome
Dev version. Enabling it now will make wpt.fyi more accurate reflect the likely
status of Chrome 72. (It's expected this will cause more tests to pass.)
--

wpt-commits: ced8eec6f128f8766a54ff767bd8db35c636b7fb
wpt-pr: 13795

testing/web-platform/tests/tools/wpt/run.py

@@ -264,6 +264,8 @@ def setup_kwargs(self, kwargs):
         if kwargs["browser_channel"] == "dev":
             logger.info("Automatically turning on experimental features for Chrome Dev")
             kwargs["binary_args"].append("--enable-experimental-web-platform-features")
+            # TODO(foolip): remove after unified plan is enabled on Chrome stable
+            kwargs["binary_args"].append("--enable-features=RTCUnifiedPlanByDefault")
 
         # Allow audio autoplay without a user gesture.
         kwargs["binary_args"].append("--autoplay-policy=no-user-gesture-required")