modify CertVerifier Class

* respond to multiple similar verification requests.
* accept net error result as callback response.

lib/browser/api/session.js

@@ -1,5 +1,5 @@
 const {EventEmitter} = require('events')
-const {app} = require('electron')
+const {app, deprecate} = require('electron')
 const {fromPartition, Session, Cookies} = process.atomBinding('session')
 
 // Public API.
@@ -20,3 +20,22 @@ Object.setPrototypeOf(Cookies.prototype, EventEmitter.prototype)
 Session.prototype._init = function () {
   app.emit('session-created', this)
 }
+
+// Remove after 2.0
+Session.prototype.setCertificateVerifyProc = function (verifyProc) {
+  if (!verifyProc) {
+    this._setCertificateVerifyProc(null)
+    return
+  }
+  if (verifyProc.length <= 3) {
+    deprecate.warn('setCertificateVerifyproc(hostname, certificate, callback)',
+      'setCertificateVerifyproc(hostname, certificate, error, callback)')
+    this._setCertificateVerifyProc((hostname, certificate, error, cb) => {
+      verifyProc(hostname, certificate, (result) => {
+        cb(result ? 0 : -2)
+      })
+    })
+  } else {
+    this._setCertificateVerifyProc(verifyProc)
+  }
+}