PaymentHandler: Initial implementation for PaymentInstruments.

third_party/WebKit/Source/modules/payments/PaymentAppManager.cpp

Index: third_party/WebKit/Source/modules/payments/PaymentAppManager.cpp
diff --git a/third_party/WebKit/Source/modules/payments/PaymentAppManager.cpp b/third_party/WebKit/Source/modules/payments/PaymentAppManager.cpp
index b9968788d8b81a55261afe9a3416b4158c862b40..8b227cb651fae924189528f5838e10e706b802ac 100644
--- a/third_party/WebKit/Source/modules/payments/PaymentAppManager.cpp
+++ b/third_party/WebKit/Source/modules/payments/PaymentAppManager.cpp
@@ -9,6 +9,7 @@
 #include "core/dom/DOMException.h"
 #include "modules/payments/PaymentAppManifest.h"
 #include "modules/payments/PaymentAppOption.h"
+#include "modules/payments/PaymentInstruments.h"
 #include "modules/serviceworkers/ServiceWorkerRegistration.h"
 #include "platform/mojo/MojoHelper.h"
 #include "public/platform/InterfaceProvider.h"
@@ -129,12 +130,20 @@ ScriptPromise PaymentAppManager::getManifest(ScriptState* scriptState) {
   return promise;
 }
 
+PaymentInstruments* PaymentAppManager::instruments() {
+  if (!m_instruments) {
+    m_instruments = new PaymentInstruments();
+  }
+  return m_instruments;
+}
+
 DEFINE_TRACE(PaymentAppManager) {
   visitor->trace(m_registration);
+  visitor->trace(m_instruments);
 }
 
 PaymentAppManager::PaymentAppManager(ServiceWorkerRegistration* registration)
-    : m_registration(registration) {
+    : m_registration(registration), m_instruments(nullptr) {
   DCHECK(registration);
   Platform::current()->interfaceProvider()->getInterface(
       mojo::MakeRequest(&m_manager));