Enable iframe support for web payments by default.

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 475 matching lines @@
 
   // 2. If |document|'s browsing context is a top-level browsing context, then
   // return true.
   if (frame->isMainFrame())
     return true;
 
   // 3. If |document|'s browsing context has a browsing context container that
   // is an iframe element with an |allowpaymentrequest| attribute specified, and
   // whose node document is allowed to use the feature indicated by
   // |allowpaymentrequest|, then return true.
-  if (RuntimeEnabledFeatures::paymentRequestIFrameEnabled() && frame->owner() &&
-      frame->owner()->allowPaymentRequest()) {
+  if (frame->owner() && frame->owner()->allowPaymentRequest())
     return allowedToUsePaymentRequest(frame->tree().parent());
-  }
 
   // 4. Return false.
   return false;
 }
 
 }  // namespace
 
 PaymentRequest* PaymentRequest::create(
     Document& document,
     const HeapVector<PaymentMethodData>& methodData,
@@ skipping 177 matching lines @@
   if (exceptionState.hadException())
     return;
 
   if (!document.isSecureContext()) {
     exceptionState.throwSecurityError("Must be in a secure context");
     return;
   }
 
   if (!allowedToUsePaymentRequest(document.frame())) {
     exceptionState.throwSecurityError(
-        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");
+        "Must be in a top-level browsing context or an iframe needs to specify "
+        "'allowpaymentrequest' explicitly");
     return;
   }
 
   PaymentDetailsPtr validatedDetails =
       payments::mojom::blink::PaymentDetails::New();
   validateAndConvertPaymentDetails(details, m_options.requestShipping(),
                                    validatedDetails, m_shippingOption,
                                    exceptionState);
   if (exceptionState.hadException())
     return;
@@ skipping 213 matching lines @@
   m_completeResolver.clear();
   m_showResolver.clear();
   m_abortResolver.clear();
   m_canMakePaymentResolver.clear();
   if (m_clientBinding.is_bound())
     m_clientBinding.Close();
   m_paymentProvider.reset();
 }
 
 }  // namespace blink