Enable the ESLint object-shorthand rule in the extensions/chromium/-folder

Based on the following compatibility information, there can't be any compelling reason to not enable this ESLint rule now: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Object_initializer#browser_compatibility

See also https://eslint.org/docs/rules/object-shorthand

extensions/chromium/preserve-referer.js

@@ -123,7 +123,7 @@ chrome.runtime.onConnect.addListener(function onReceivePort(port) {
         {
           urls: [data.requestUrl],
           types: ["xmlhttprequest"],
-          tabId: tabId,
+          tabId,
         },
         ["blocking", ...extraInfoSpecWithHeaders]
       );
@@ -148,7 +148,7 @@ chrome.runtime.onConnect.addListener(function onReceivePort(port) {
     {
       urls: ["https://*/*"],
       types: ["xmlhttprequest"],
-      tabId: tabId,
+      tabId,
     },
     ["blocking", "responseHeaders"]
   );