Try to close Chrome cleanly on exit on Windows

This doesn't yet work perfectly, looks like shutdown generally
on Windows isn't very clean, but it should help when that does
work better later.

Author: pimterry

src/interceptors/chromium-based-interceptors.ts

@@ -283,6 +283,16 @@ abstract class ExistingChromiumBasedInterceptor implements Interceptor {
     async deactivate(proxyPort: number | string) {
         if (this.isActive(proxyPort)) {
             const { browser } = this.activeBrowser!;
+
+            if (process.platform === 'win32') {
+                // Try to cleanly close if we can, rather than killing Chrome directly:
+                try {
+                    await windowsClose(browser!.pid)
+                        .then(() => waitForExit(browser!.pid));
+                    return;
+                } catch (e) {} // If this fails/times out, kill like we do elsewhere:
+            }
+
             const exitPromise = new Promise((resolve) => browser!.process.once('close', resolve));
             browser!.stop();
             await exitPromise;