dawn.node: Make run-cts disable disallow_unsafe_apis

Bug: dawn:1123
Change-Id: I2696dedf8249f5cfd8fe0138b7ee43e567a4ddf5
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/85504
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>

src/dawn/node/tools/src/cmd/run-cts/main.go

@@ -199,11 +199,24 @@ func run() error {
 		}
 	}
 
+	// Forward the backend to use, if specified.
 	if backend != "default" {
 		fmt.Println("Forcing backend to", backend)
 		flags = append(flags, fmt.Sprint("dawn-backend=", backend))
 	}
 
+	// While running the CTS, always allow unsafe APIs so they can be tested.
+	disableDawnFeaturesFound := false
+	for i, flag := range flags {
+		if strings.HasPrefix(flag, "disable-dawn-features=") {
+			flags[i] = flag + ",disallow_unsafe_apis"
+			disableDawnFeaturesFound = true
+		}
+	}
+	if !disableDawnFeaturesFound {
+		flags = append(flags, "disable-dawn-features=disallow_unsafe_apis")
+	}
+
 	r := runner{
 		numRunners: numRunners,
 		verbose:    verbose,