Restart crash service in each spec

spec/fixtures/api/crash-restart.html

@@ -3,7 +3,7 @@
 <script type="text/javascript" charset="utf-8">
 
 const {port} = require('url').parse(window.location.href, true).query
-const {crashReporter} = require('electron')
+const {crashReporter, ipcRenderer} = require('electron')
 
 crashReporter.start({
   productName: 'Zombies',
@@ -18,6 +18,10 @@ crashReporter.start({
   }
 })
 
+if (process.platform === 'win32') {
+  ipcRenderer.sendSync('crash-service-pid', crashReporter._crashServiceProcess.pid)
+}
+
 setImmediate(() => {
   if (process.platform === 'darwin') {
     crashReporter.setExtraParameter('extra2', 'extra2')