chore: emit license header comments (#334)

Author: mathiasbynens

scripts/protocol-dts-generator.ts

@@ -4,8 +4,8 @@ import type { IProtocol, Protocol as P } from './protocol-schema.d.ts';
 
 
 // TODO: @noj validate this via https://github.com/andischerer/typescript-json-typesafe against protocol-schema.d.ts
-import jsProtocolJson from '../json/js_protocol.json' with { type: 'json' }; 
-import browserProtocolJson from '../json/browser_protocol.json' with { type: 'json' }; 
+import jsProtocolJson from '../json/js_protocol.json' with { type: 'json' };
+import browserProtocolJson from '../json/browser_protocol.json' with { type: 'json' };
 
 
 const jsProtocol = jsProtocolJson as IProtocol;
@@ -56,10 +56,14 @@ const emitCloseBlock = (closeChar = '}') => {
 }
 
 const emitHeaderComments = () => {
-    emitLine('/**********************************************************************')
-    emitLine(' * Auto-generated by protocol-dts-generator.ts, do not edit manually. *')
-    emitLine(' **********************************************************************/')
-    emitLine()
+    emitLine(`// Copyright (c) ${new Date().getFullYear()} The Chromium Authors. All rights reserved.`);
+    emitLine('// Use of this source code is governed by a BSD-style license that can be');
+    emitLine('// found in the LICENSE file.');
+    emitLine();
+    emitLine('/**********************************************************************');
+    emitLine(' * Auto-generated by protocol-dts-generator.ts. Do not edit manually. *');
+    emitLine(' **********************************************************************/');
+    emitLine();
 }
 
 const fixCamelCase = (name: string): string => {
@@ -268,7 +272,7 @@ const emitEvent = (event: P.Event) => {
     if (!event.parameters) {
         return
     }
-    
+
     emitInlineEnumsForEvents(event);
     emitLine()
     emitTsComment(event)