Do not parse JSON in the browser.

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

 // 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.
 
 #ifndef PaymentRequest_h
 #define PaymentRequest_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptValue.h"
 #include "bindings/core/v8/ScriptWrappable.h"
@@ skipping 40 matching lines @@
                                 const PaymentDetails&,
                                 ExceptionState&);
   static PaymentRequest* create(ScriptState*,
                                 const HeapVector<PaymentMethodData>&,
                                 const PaymentDetails&,
                                 const PaymentOptions&,
                                 ExceptionState&);
 
   virtual ~PaymentRequest();
 
-  struct MethodData {
-    MethodData(const Vector<String>& methods, const String& data)
-        : supportedMethods(methods), stringifiedData(data) {}
-    Vector<String> supportedMethods;
-    String stringifiedData;
-  };
-
   ScriptPromise show(ScriptState*);
   ScriptPromise abort(ScriptState*);
 
   PaymentAddress* getShippingAddress() const { return m_shippingAddress.get(); }
   const String& shippingOption() const { return m_shippingOption; }
   const String& shippingType() const { return m_shippingType; }
 
   DEFINE_ATTRIBUTE_EVENT_LISTENER(shippingaddresschange);
   DEFINE_ATTRIBUTE_EVENT_LISTENER(shippingoptionchange);
 
@@ skipping 47 matching lines @@
   Member<ScriptPromiseResolver> m_completeResolver;
   Member<ScriptPromiseResolver> m_abortResolver;
   payments::mojom::blink::PaymentRequestPtr m_paymentProvider;
   mojo::Binding<payments::mojom::blink::PaymentRequestClient> m_clientBinding;
   Timer<PaymentRequest> m_completeTimer;
 };
 
 }  // namespace blink
 
 #endif  // PaymentRequest_h