Mark IFrame support in PaymentRequest experimental

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

 // Copyright 2016 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 "modules/payments/PaymentRequest.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/V8StringResource.h"
@@ skipping 11 matching lines @@
 #include "modules/payments/AndroidPayTokenization.h"
 #include "modules/payments/HTMLIFrameElementPayments.h"
 #include "modules/payments/PaymentAddress.h"
 #include "modules/payments/PaymentItem.h"
 #include "modules/payments/PaymentRequestUpdateEvent.h"
 #include "modules/payments/PaymentResponse.h"
 #include "modules/payments/PaymentShippingOption.h"
 #include "modules/payments/PaymentsValidators.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "mojo/public/cpp/bindings/wtf_array.h"
+#include "platform/RuntimeEnabledFeatures.h"
 #include "platform/mojo/MojoHelper.h"
 #include "public/platform/InterfaceProvider.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebTraceLocation.h"
 #include "wtf/HashSet.h"
 #include <utility>
 
 using payments::mojom::blink::ActivePaymentQueryResult;
 using payments::mojom::blink::PaymentAddressPtr;
 using payments::mojom::blink::PaymentCurrencyAmount;
@@ skipping 683 matching lines @@
   if (exceptionState.hadException())
     return;
 
   if (!scriptState->getExecutionContext()->isSecureContext()) {
     exceptionState.throwSecurityError("Must be in a secure context");
     return;
   }
 
   if (!allowedToUsePaymentRequest(scriptState->domWindow()->frame())) {
     exceptionState.throwSecurityError(
-        "Must be in a top-level browsing context or an iframe needs to specify "
-        "'allowpaymentrequest' explicitly");
+        RuntimeEnabledFeatures::paymentRequestIFrameEnabled()
+            ? "Must be in a top-level browsing context or an iframe needs to "
+              "specify 'allowpaymentrequest' explicitly"
+            : "Must be in a top-level browsing context");
     return;
   }
 
   bool keepShippingOptions = validatePaymentDetails(details, exceptionState);
   if (exceptionState.hadException())
     return;
 
   if (details.hasError() && !details.error().isEmpty()) {
     exceptionState.throwTypeError("Error value should be empty");
     return;
@@ skipping 216 matching lines @@
   m_completeResolver.clear();
   m_showResolver.clear();
   m_abortResolver.clear();
   m_canMakeActivePaymentResolver.clear();
   if (m_clientBinding.is_bound())
     m_clientBinding.Close();
   m_paymentProvider.reset();
 }
 
 }  // namespace blink