build: lint commits on Chromium roller branches (#49655)

* build: lint commits on Chromium roller branches

Assisted-By: Claude Opus 4.5

* chore: add ability to skip linting CLs by adding #nolint

* chore: only exit with non-zero exit code in CI

script/lib/utils.js

@@ -142,8 +142,29 @@ async function findMatchingFiles (top, test) {
     });
 }
 
+function compareVersions (v1, v2) {
+  const [split1, split2] = [v1.split('.'), v2.split('.')];
+
+  if (split1.length !== split2.length) {
+    throw new Error(
+      `Expected version strings to have same number of sections: ${split1} and ${split2}`
+    );
+  }
+  for (let i = 0; i < split1.length; i++) {
+    const p1 = parseInt(split1[i], 10);
+    const p2 = parseInt(split2[i], 10);
+
+    if (p1 > p2) return 1;
+    else if (p1 < p2) return -1;
+    // Continue checking the value if this portion is equal
+  }
+
+  return 0;
+}
+
 module.exports = {
   chunkFilenames,
+  compareVersions,
   findMatchingFiles,
   getCurrentBranch,
   getElectronExec,