From: Gentoo Overlay <gentoo@localhost>
Subject: [PATCH] chromium-bidi: fix isolated declaration emit for defaulted parameter

The CommandProcessor constructor parameter `parser` has a default value,
so its type implicitly includes undefined. TypeScript's isolated
declaration emit (used by the devtools build for the chromium-bidi
.d.ts targets) does not support adding undefined implicitly, so spell
it out.

--- a/third_party/chromium-bidi/src/bidiMapper/CommandProcessor.ts
+++ b/third_party/chromium-bidi/src/bidiMapper/CommandProcessor.ts
@@ -99,7 +99,7 @@
     bluetoothProcessor: BluetoothProcessor,
     digitalCredentialsProcessor: DigitalCredentialsProcessor,
     userContextStorage: UserContextStorage,
-    parser: BidiCommandParameterParser = new BidiNoOpParser(),
+    parser: BidiCommandParameterParser|undefined = new BidiNoOpParser(),
     initConnection: (options: MapperOptions) => Promise<void>,
     logger?: LoggerFn,
   ) {