PaymentHandler: Implement PaymentRequestEvent constructor.

third_party/WebKit/Source/modules/payments/PaymentRequestEvent.h

Index: third_party/WebKit/Source/modules/payments/PaymentRequestEvent.h
diff --git a/third_party/WebKit/Source/modules/payments/PaymentRequestEvent.h b/third_party/WebKit/Source/modules/payments/PaymentRequestEvent.h
index 42be7d1596a5a20e22e4bdfaae8570250abf82ae..7d19b60e59253fe30dc0bba476cf1953da5acf4a 100644
--- a/third_party/WebKit/Source/modules/payments/PaymentRequestEvent.h
+++ b/third_party/WebKit/Source/modules/payments/PaymentRequestEvent.h
@@ -24,6 +24,8 @@ class MODULES_EXPORT PaymentRequestEvent final : public ExtendableEvent {
 
  public:
   static PaymentRequestEvent* Create(const AtomicString& type,
+                                     const PaymentRequestEventInit&);
+  static PaymentRequestEvent* Create(const AtomicString& type,
                                      const PaymentRequestEventInit&,
                                      RespondWithObserver*,
                                      WaitUntilObserver*);
@@ -45,6 +47,7 @@ class MODULES_EXPORT PaymentRequestEvent final : public ExtendableEvent {
   DECLARE_VIRTUAL_TRACE();
 
  private:
+  PaymentRequestEvent(const AtomicString& type, const PaymentRequestEventInit&);

[please use gerrit instead, 2017/06/05 15:38:55]

Would you mind having a single constructor that both Create() methods invoke?

[zino, 2017/06/06 15:03:12]

Done.

   PaymentRequestEvent(const AtomicString& type,
                       const PaymentRequestEventInit&,
                       RespondWithObserver*,