feat: Add data parameter to app.requestSingleInstanceLock() (#30891)

* WIP

* Use serialization

* Rebase windows impl of new app requestSingleInstanceLock parameter

* Fix test

* Implement posix side

* Add backwards compatibility test

* Apply PR feedback Windows

* Fix posix impl

* Switch mac impl back to vector

* Refactor Windows impl

* Use vectors, inline make_span

* Use blink converter

* fix: ownership across sequences

* Fix upstream merge from Chromium

Co-authored-by: deepak1556 <hop2deep@gmail.com>

spec/fixtures/api/singleton-data/main.js

@@ -0,0 +1,26 @@
+const { app } = require('electron');
+
+app.whenReady().then(() => {
+  console.log('started'); // ping parent
+});
+
+const obj = {
+  level: 1,
+  testkey: 'testvalue1',
+  inner: {
+    level: 2,
+    testkey: 'testvalue2'
+  }
+};
+const gotTheLock = app.requestSingleInstanceLock(obj);
+
+app.on('second-instance', (event, args, workingDirectory, data) => {
+  setImmediate(() => {
+    console.log([JSON.stringify(args), JSON.stringify(data)].join('||'));
+    app.exit(0);
+  });
+});
+
+if (!gotTheLock) {
+  app.exit(1);
+}

spec/fixtures/api/singleton-data/package.json

@@ -0,0 +1,5 @@
+{
+  "name": "electron-app-singleton-data",
+  "main": "main.js"
+}
+

spec/fixtures/api/singleton/main.js

@@ -6,9 +6,9 @@ app.whenReady().then(() => {
 
 const gotTheLock = app.requestSingleInstanceLock();
 
-app.on('second-instance', (event, args) => {
+app.on('second-instance', (event, args, workingDirectory, data) => {
   setImmediate(() => {
-    console.log(JSON.stringify(args));
+    console.log([JSON.stringify(args), JSON.stringify(data)].join('||'));
     app.exit(0);
   });
 });