Add canMakeActivePayment() method to web payments.

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

Index: third_party/WebKit/Source/modules/payments/PaymentRequest.cpp
diff --git a/third_party/WebKit/Source/modules/payments/PaymentRequest.cpp b/third_party/WebKit/Source/modules/payments/PaymentRequest.cpp
index 44a9373fbbb401d6188579acaf0c3a692523ea3b..41c09b9c97da9c4ec7be037cc4085949ddeef2c1 100644
--- a/third_party/WebKit/Source/modules/payments/PaymentRequest.cpp
+++ b/third_party/WebKit/Source/modules/payments/PaymentRequest.cpp
@@ -527,6 +527,20 @@ ScriptPromise PaymentRequest::abort(ScriptState* scriptState) {
   return m_abortResolver->promise();
 }
 
+ScriptPromise PaymentRequest::canMakeActivePayment(ScriptState* scriptState) {
+  if (!m_paymentProvider.is_bound() || m_canMakeActivePaymentResolver ||
+      !scriptState->contextIsValid()) {
+    return ScriptPromise::rejectWithDOMException(
+        scriptState, DOMException::create(InvalidStateError,
+                                          "Cannot query payment request"));
+  }
+
+  m_paymentProvider->CanMakeActivePayment();
+
+  m_canMakeActivePaymentResolver = ScriptPromiseResolver::create(scriptState);
+  return m_canMakeActivePaymentResolver->promise();
+}
+
 bool PaymentRequest::hasPendingActivity() const {
   return m_showResolver || m_completeResolver;
 }
@@ -618,6 +632,7 @@ DEFINE_TRACE(PaymentRequest) {
   visitor->trace(m_showResolver);
   visitor->trace(m_completeResolver);
   visitor->trace(m_abortResolver);
+  visitor->trace(m_canMakeActivePaymentResolver);
   EventTargetWithInlineData::trace(visitor);
   ContextLifecycleObserver::trace(visitor);
 }
@@ -812,6 +827,9 @@ void PaymentRequest::OnError(mojo::PaymentErrorReason error) {
 
     if (m_abortResolver)
       m_abortResolver->reject(DOMException::create(ec, message));
+
+    if (m_canMakeActivePaymentResolver)
+      m_canMakeActivePaymentResolver->reject(DOMException::create(ec, message));
   } else {
     if (m_completeResolver)
       m_completeResolver->reject(message);
@@ -821,6 +839,9 @@ void PaymentRequest::OnError(mojo::PaymentErrorReason error) {
 
     if (m_abortResolver)
       m_abortResolver->reject(message);
+
+    if (m_canMakeActivePaymentResolver)
+      m_canMakeActivePaymentResolver->reject(message);
   }
 
   clearResolversAndCloseMojoConnection();
@@ -847,6 +868,25 @@ void PaymentRequest::OnAbort(bool abortedSuccessfully) {
   clearResolversAndCloseMojoConnection();
 }
 
+void PaymentRequest::OnCanMakeActivePayment(
+    mojom::blink::ActivePaymentQueryResult result) {
+  DCHECK(m_canMakeActivePaymentResolver);
+
+  switch (result) {
+    case mojom::blink::ActivePaymentQueryResult::CAN_MAKE_ACTIVE_PAYMENT:
+      m_canMakeActivePaymentResolver->resolve(true);
+      break;
+    case mojom::blink::ActivePaymentQueryResult::CANNOT_MAKE_ACTIVE_PAYMENT:
+      m_canMakeActivePaymentResolver->resolve(false);
+      break;
+    case mojom::blink::ActivePaymentQueryResult::QUERY_QUOTA_EXCEEDED:
+      m_canMakeActivePaymentResolver->reject("Query quota exceeded");
+      break;
+  }
+
+  m_canMakeActivePaymentResolver.clear();
+}
+
 void PaymentRequest::onCompleteTimeout(TimerBase*) {
   m_paymentProvider->Complete(mojom::blink::PaymentComplete(Fail));
   clearResolversAndCloseMojoConnection();
@@ -857,6 +897,7 @@ void PaymentRequest::clearResolversAndCloseMojoConnection() {
   m_completeResolver.clear();
   m_showResolver.clear();
   m_abortResolver.clear();
+  m_canMakeActivePaymentResolver.clear();
   if (m_clientBinding.is_bound())
     m_clientBinding.Close();
   m_paymentProvider.reset();