Fixing code review issues: adding some test cases for partition/session options.

lib/browser/api/net.js

@@ -5,7 +5,7 @@ const {EventEmitter} = require('events')
 const util = require('util')
 const {Readable} = require('stream')
 const {app} = require('electron')
-const {session} = require('electron')
+const {Session} = process.atomBinding('session')
 const {net, Net} = process.atomBinding('net')
 const {URLRequest} = net
 
@@ -161,7 +161,7 @@ class ClientRequest extends EventEmitter {
       url: urlStr
     }
     if (options.session) {
-      if (options.session instanceof session.Session) {
+      if (options.session instanceof Session) {
         urlRequestOptions.session = options.session
       } else {
         throw new TypeError('`session` should be an instance of the Session class.')