PaymentRequest: Implement skeleton code for PaymentMethodChange event

The event handler is triggered when the user changes payment method.
This CL only defines the event in Blink side. A follow-up CL will make
the event fire when user changes payment method on UI.

This feature is still behind runtime flag(PaymentMethodChange).

Intent to implement:
  https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/e8Zrmy52r9w

Related spec link:
  https://w3c.github.io/payment-request/#paymentmethodchangeevent-interface

Bug: 824760
Change-Id: Ica77b46cbeeee78184a2bd66ce2198aae39b0c7a
Reviewed-on: https://chromium-review.googlesource.com/1226774Reviewed-by: Rouslan Solomakhin <rouslan@chromium.org>
Reviewed-by: Yuki Shiino <yukishiino@chromium.org>
Reviewed-by: Tim Volodine <timvolodine@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Jinho Bang <jinho.bang@samsung.com>
Cr-Commit-Position: refs/heads/master@{#595664}

android_webview/tools/system_webview_shell/test/data/webexposed/not-webview-exposed.txt

@@ -17,6 +17,7 @@ interface Notification : EventTarget
 
 # web payments api not enabled in webiew, crbug.com/667069
 interface PaymentAddress
+interface PaymentMethodChangeEvent : PaymentRequestUpdateEvent
 interface PaymentRequest : EventTarget
 interface PaymentRequestUpdateEvent : Event
 interface PaymentResponse : EventTarget

third_party/WebKit/LayoutTests/external/wpt/payment-request/PaymentMethodChangeEvent/methodDetails-attribute.https-expected.txt

-This is a testharness.js-based test.
-FAIL Must have a methodDetails IDL attribute, which is initialized with to the methodName dictionary value PaymentMethodChangeEvent is not defined
-FAIL The methodDetails member defaults to null PaymentMethodChangeEvent is not defined
-Harness: the test ran to completion.
-

third_party/WebKit/LayoutTests/external/wpt/payment-request/PaymentMethodChangeEvent/methodName-attribute.https-expected.txt

-This is a testharness.js-based test.
-FAIL Must have a methodName IDL attribute, which is initialized with to the methodName dictionary value PaymentMethodChangeEvent is not defined
-FAIL When no dictionary is passed, the methodName member defaults to the empty string PaymentMethodChangeEvent is not defined
-Harness: the test ran to completion.
-

third_party/WebKit/LayoutTests/external/wpt/payment-request/idlharness.https.window-expected.txt

@@ -16,7 +16,7 @@ PASS PaymentRequest interface: attribute shippingType
 FAIL PaymentRequest interface: attribute onmerchantvalidation assert_true: The prototype object must have a property "onmerchantvalidation" expected true got false
 PASS PaymentRequest interface: attribute onshippingaddresschange
 PASS PaymentRequest interface: attribute onshippingoptionchange
-FAIL PaymentRequest interface: attribute onpaymentmethodchange assert_true: The prototype object must have a property "onpaymentmethodchange" expected true got false
+PASS PaymentRequest interface: attribute onpaymentmethodchange
 PASS PaymentRequest must be primary interface of paymentRequest
 PASS Stringification of paymentRequest
 PASS PaymentRequest interface: paymentRequest must inherit property "show([object Object])" with the proper type
@@ -30,7 +30,7 @@ PASS PaymentRequest interface: paymentRequest must inherit property "shippingTyp
 FAIL PaymentRequest interface: paymentRequest must inherit property "onmerchantvalidation" with the proper type assert_inherits: property "onmerchantvalidation" not found in prototype chain
 PASS PaymentRequest interface: paymentRequest must inherit property "onshippingaddresschange" with the proper type
 PASS PaymentRequest interface: paymentRequest must inherit property "onshippingoptionchange" with the proper type
-FAIL PaymentRequest interface: paymentRequest must inherit property "onpaymentmethodchange" with the proper type assert_inherits: property "onpaymentmethodchange" not found in prototype chain
+PASS PaymentRequest interface: paymentRequest must inherit property "onpaymentmethodchange" with the proper type
 PASS PaymentAddress interface: existence and properties of interface object
 PASS PaymentAddress interface object length
 PASS PaymentAddress interface object name
@@ -83,20 +83,20 @@ FAIL MerchantValidationEvent interface: new MerchantValidationEvent("merchantval
 FAIL MerchantValidationEvent interface: new MerchantValidationEvent("merchantvalidation") must inherit property "validationURL" with the proper type assert_equals: Unexpected exception when evaluating object expected null but got object "ReferenceError: MerchantValidationEvent is not defined"
 FAIL MerchantValidationEvent interface: new MerchantValidationEvent("merchantvalidation") must inherit property "complete([object Object])" with the proper type assert_equals: Unexpected exception when evaluating object expected null but got object "ReferenceError: MerchantValidationEvent is not defined"
 FAIL MerchantValidationEvent interface: calling complete([object Object]) on new MerchantValidationEvent("merchantvalidation") with too few arguments must throw TypeError assert_equals: Unexpected exception when evaluating object expected null but got object "ReferenceError: MerchantValidationEvent is not defined"
-FAIL PaymentMethodChangeEvent interface: existence and properties of interface object assert_own_property: self does not have own property "PaymentMethodChangeEvent" expected property "PaymentMethodChangeEvent" missing
-FAIL PaymentMethodChangeEvent interface object length assert_own_property: self does not have own property "PaymentMethodChangeEvent" expected property "PaymentMethodChangeEvent" missing
-FAIL PaymentMethodChangeEvent interface object name assert_own_property: self does not have own property "PaymentMethodChangeEvent" expected property "PaymentMethodChangeEvent" missing
-FAIL PaymentMethodChangeEvent interface: existence and properties of interface prototype object assert_own_property: self does not have own property "PaymentMethodChangeEvent" expected property "PaymentMethodChangeEvent" missing
-FAIL PaymentMethodChangeEvent interface: existence and properties of interface prototype object's "constructor" property assert_own_property: self does not have own property "PaymentMethodChangeEvent" expected property "PaymentMethodChangeEvent" missing
-FAIL PaymentMethodChangeEvent interface: existence and properties of interface prototype object's @@unscopables property assert_own_property: self does not have own property "PaymentMethodChangeEvent" expected property "PaymentMethodChangeEvent" missing
-FAIL PaymentMethodChangeEvent interface: attribute methodName assert_own_property: self does not have own property "PaymentMethodChangeEvent" expected property "PaymentMethodChangeEvent" missing
-FAIL PaymentMethodChangeEvent interface: attribute methodDetails assert_own_property: self does not have own property "PaymentMethodChangeEvent" expected property "PaymentMethodChangeEvent" missing
-FAIL PaymentMethodChangeEvent must be primary interface of new PaymentMethodChangeEvent("paymentmethodchange") assert_equals: Unexpected exception when evaluating object expected null but got object "ReferenceError: PaymentMethodChangeEvent is not defined"
-FAIL Stringification of new PaymentMethodChangeEvent("paymentmethodchange") assert_equals: Unexpected exception when evaluating object expected null but got object "ReferenceError: PaymentMethodChangeEvent is not defined"
-FAIL PaymentMethodChangeEvent interface: new PaymentMethodChangeEvent("paymentmethodchange") must inherit property "methodName" with the proper type assert_equals: Unexpected exception when evaluating object expected null but got object "ReferenceError: PaymentMethodChangeEvent is not defined"
-FAIL PaymentMethodChangeEvent interface: new PaymentMethodChangeEvent("paymentmethodchange") must inherit property "methodDetails" with the proper type assert_equals: Unexpected exception when evaluating object expected null but got object "ReferenceError: PaymentMethodChangeEvent is not defined"
-FAIL PaymentRequestUpdateEvent interface: new PaymentMethodChangeEvent("paymentmethodchange") must inherit property "updateWith([object Object])" with the proper type assert_equals: Unexpected exception when evaluating object expected null but got object "ReferenceError: PaymentMethodChangeEvent is not defined"
-FAIL PaymentRequestUpdateEvent interface: calling updateWith([object Object]) on new PaymentMethodChangeEvent("paymentmethodchange") with too few arguments must throw TypeError assert_equals: Unexpected exception when evaluating object expected null but got object "ReferenceError: PaymentMethodChangeEvent is not defined"
+PASS PaymentMethodChangeEvent interface: existence and properties of interface object
+PASS PaymentMethodChangeEvent interface object length
+PASS PaymentMethodChangeEvent interface object name
+PASS PaymentMethodChangeEvent interface: existence and properties of interface prototype object
+PASS PaymentMethodChangeEvent interface: existence and properties of interface prototype object's "constructor" property
+PASS PaymentMethodChangeEvent interface: existence and properties of interface prototype object's @@unscopables property
+PASS PaymentMethodChangeEvent interface: attribute methodName
+PASS PaymentMethodChangeEvent interface: attribute methodDetails
+PASS PaymentMethodChangeEvent must be primary interface of new PaymentMethodChangeEvent("paymentmethodchange")
+PASS Stringification of new PaymentMethodChangeEvent("paymentmethodchange")
+PASS PaymentMethodChangeEvent interface: new PaymentMethodChangeEvent("paymentmethodchange") must inherit property "methodName" with the proper type
+PASS PaymentMethodChangeEvent interface: new PaymentMethodChangeEvent("paymentmethodchange") must inherit property "methodDetails" with the proper type
+PASS PaymentRequestUpdateEvent interface: new PaymentMethodChangeEvent("paymentmethodchange") must inherit property "updateWith([object Object])" with the proper type
+PASS PaymentRequestUpdateEvent interface: calling updateWith([object Object]) on new PaymentMethodChangeEvent("paymentmethodchange") with too few arguments must throw TypeError
 PASS PaymentRequestUpdateEvent interface: existence and properties of interface object
 PASS PaymentRequestUpdateEvent interface object length
 PASS PaymentRequestUpdateEvent interface object name

third_party/WebKit/LayoutTests/external/wpt/payment-request/onpaymentmenthodchange-attribute.https-expected.txt

-This is a testharness.js-based test.
-FAIL Must have a onpaymentmethodchange IDL attribute assert_idl_attribute: property "onpaymentmethodchange" not found in prototype chain
-FAIL onpaymentmethodchange attribute is a generic handler for "paymentmethodchange" assert_true: event did not fire expected true got false
-FAIL onpaymentmethodchange attribute is a handler for PaymentMethodChangeEvent PaymentMethodChangeEvent is not defined
-FAIL onpaymentmethodchange attribute and listeners both work PaymentMethodChangeEvent is not defined
-Harness: the test ran to completion.
-

third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt

@@ -5068,9 +5068,15 @@ interface PaymentManager
     getter userHint
     method constructor
     setter userHint
+interface PaymentMethodChangeEvent : PaymentRequestUpdateEvent
+    attribute @@toStringTag
+    getter methodDetails
+    getter methodName
+    method constructor
 interface PaymentRequest : EventTarget
     attribute @@toStringTag
     getter id
+    getter onpaymentmethodchange
     getter onshippingaddresschange
     getter onshippingoptionchange
     getter shippingAddress
@@ -5080,6 +5086,7 @@ interface PaymentRequest : EventTarget
     method canMakePayment
     method constructor
     method show
+    setter onpaymentmethodchange
     setter onshippingaddresschange
     setter onshippingoptionchange
 interface PaymentRequestUpdateEvent : Event

third_party/blink/renderer/core/events/event_type_names.json5

@@ -195,6 +195,7 @@
     "paste",
     "pause",
     "payerdetailchange",
+    "paymentmethodchange",
     "paymentrequest",
     "periodicsync",
     "pictureinpicturecontrolclick",

third_party/blink/renderer/modules/modules_idl_files.gni

@@ -212,6 +212,7 @@ modules_idl_files =
           "payments/payment_address.idl",
           "payments/payment_instruments.idl",
           "payments/payment_manager.idl",
+          "payments/payment_method_change_event.idl",
           "payments/payment_request.idl",
           "payments/payment_request_event.idl",
           "payments/payment_request_update_event.idl",
@@ -591,6 +592,7 @@ modules_dictionary_idl_files =
           "payments/payment_handler_response.idl",
           "payments/payment_instrument.idl",
           "payments/payment_item.idl",
+          "payments/payment_method_change_event_init.idl",
           "payments/payment_method_data.idl",
           "payments/payment_options.idl",
           "payments/payment_request_event_init.idl",

third_party/blink/renderer/modules/payments/BUILD.gn

@@ -31,6 +31,8 @@ blink_modules_sources("payments") {
     "payment_instruments.h",
     "payment_manager.cc",
     "payment_manager.h",
+    "payment_method_change_event.cc",
+    "payment_method_change_event.h",
     "payment_request.cc",
     "payment_request.h",
     "payment_request_event.cc",

third_party/blink/renderer/modules/payments/payment_method_change_event.cc

+// Copyright 2018 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "third_party/blink/renderer/modules/payments/payment_method_change_event.h"
+
+#include "third_party/blink/renderer/core/execution_context/execution_context.h"
+#include "third_party/blink/renderer/platform/bindings/script_state.h"
+
+namespace blink {
+
+PaymentMethodChangeEvent::~PaymentMethodChangeEvent() = default;
+
+// static
+PaymentMethodChangeEvent* PaymentMethodChangeEvent::Create(
+    ScriptState* script_state,
+    const AtomicString& type,
+    const PaymentMethodChangeEventInit& init) {
+  return new PaymentMethodChangeEvent(script_state, type, init);
+}
+
+const String& PaymentMethodChangeEvent::methodName() const {
+  return method_name_;
+}
+
+const ScriptValue PaymentMethodChangeEvent::methodDetails(
+    ScriptState* script_state) const {
+  return ScriptValue(script_state, method_details_.V8ValueFor(script_state));
+}
+
+PaymentMethodChangeEvent::PaymentMethodChangeEvent(
+    ScriptState* script_state,
+    const AtomicString& type,
+    const PaymentMethodChangeEventInit& init)
+    : PaymentRequestUpdateEvent(ExecutionContext::From(script_state),
+                                type,
+                                init),
+      method_name_(init.methodName()),
+      method_details_(init.hasMethodDetails()
+                          ? init.methodDetails()
+                          : ScriptValue::CreateNull(script_state)) {}
+
+}  // namespace blink

third_party/blink/renderer/modules/payments/payment_method_change_event.h

+// Copyright 2018 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_PAYMENTS_PAYMENT_METHOD_CHANGE_EVENT_H_
+#define THIRD_PARTY_BLINK_RENDERER_MODULES_PAYMENTS_PAYMENT_METHOD_CHANGE_EVENT_H_
+
+#include "third_party/blink/renderer/bindings/core/v8/script_value.h"
+#include "third_party/blink/renderer/modules/modules_export.h"
+#include "third_party/blink/renderer/modules/payments/payment_method_change_event_init.h"
+#include "third_party/blink/renderer/modules/payments/payment_request_update_event.h"
+#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
+#include "third_party/blink/renderer/platform/heap/handle.h"
+#include "third_party/blink/renderer/platform/wtf/text/atomic_string.h"
+#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
+
+namespace blink {
+
+class ScriptState;
+
+class MODULES_EXPORT PaymentMethodChangeEvent final
+    : public PaymentRequestUpdateEvent {
+  DEFINE_WRAPPERTYPEINFO();
+
+ public:
+  ~PaymentMethodChangeEvent() override;
+
+  static PaymentMethodChangeEvent* Create(
+      ScriptState*,
+      const AtomicString& type,
+      const PaymentMethodChangeEventInit& = PaymentMethodChangeEventInit());
+
+  const String& methodName() const;
+  const ScriptValue methodDetails(ScriptState*) const;
+
+ private:
+  PaymentMethodChangeEvent(ScriptState*,
+                           const AtomicString& type,
+                           const PaymentMethodChangeEventInit&);
+
+  String method_name_;
+  ScriptValue method_details_;
+};
+
+}  // namespace blink
+
+#endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_PAYMENTS_PAYMENT_METHOD_CHANGE_EVENT_H_

third_party/blink/renderer/modules/payments/payment_method_change_event.idl

+// Copyright 2018 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// https://w3c.github.io/payment-request/#paymentmethodchangeevent-interface
+
+[
+    RuntimeEnabled=PaymentMethodChangeEvent,
+    ConstructorCallWith=ScriptState,
+    Constructor(DOMString type, optional PaymentMethodChangeEventInit eventInitDict),
+    SecureContext,
+    Exposed=Window
+] interface PaymentMethodChangeEvent : PaymentRequestUpdateEvent {
+    readonly attribute DOMString methodName;
+    [CallWith=ScriptState] readonly attribute object? methodDetails;
+};

third_party/blink/renderer/modules/payments/payment_method_change_event_init.idl

+// Copyright 2018 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// https://w3c.github.io/payment-request/#paymentmethodchangeeventinit-dictionary
+
+dictionary PaymentMethodChangeEventInit : PaymentRequestUpdateEventInit {
+    DOMString methodName = "";
+    object? methodDetails = null;
+};

third_party/blink/renderer/modules/payments/payment_request.h

@@ -71,6 +71,7 @@ class MODULES_EXPORT PaymentRequest final
 
   DEFINE_ATTRIBUTE_EVENT_LISTENER(shippingaddresschange);
   DEFINE_ATTRIBUTE_EVENT_LISTENER(shippingoptionchange);
+  DEFINE_ATTRIBUTE_EVENT_LISTENER(paymentmethodchange);
 
   ScriptPromise canMakePayment(ScriptState*);
 

third_party/blink/renderer/modules/payments/payment_request.idl

@@ -25,4 +25,5 @@
 
     attribute EventHandler onshippingaddresschange;
     attribute EventHandler onshippingoptionchange;
+    [RuntimeEnabled=PaymentMethodChangeEvent] attribute EventHandler onpaymentmethodchange;
 };

third_party/blink/renderer/modules/payments/payment_request_update_event.h

@@ -20,8 +20,8 @@ class ExceptionState;
 class ExecutionContext;
 class ScriptState;
 
-class MODULES_EXPORT PaymentRequestUpdateEvent final : public Event,
-                                                       public PaymentUpdater {
+class MODULES_EXPORT PaymentRequestUpdateEvent : public Event,
+                                                 public PaymentUpdater {
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(PaymentRequestUpdateEvent)
 
@@ -47,11 +47,12 @@ class MODULES_EXPORT PaymentRequestUpdateEvent final : public Event,
 
   void OnUpdateEventTimeoutForTesting();
 
- private:
+ protected:
   PaymentRequestUpdateEvent(ExecutionContext*,
                             const AtomicString& type,
                             const PaymentRequestUpdateEventInit&);
 
+ private:
   void OnUpdateEventTimeout(TimerBase*);
 
   // True after event.updateWith() was called.

third_party/blink/renderer/platform/runtime_enabled_features.json5

@@ -933,6 +933,10 @@
       name: "PaymentApp",
       status: "experimental",
     },
+    {
+      name: "PaymentMethodChangeEvent",
+      status: "experimental",
+    },
     // PaymentRequest is enabled by default on Android
     {
       name: "PaymentRequest",