Remove PaymentResponse.totalAmount according to latest spec

third_party/WebKit/Source/modules/payments/PaymentResponse.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 PaymentResponse_h
 #define PaymentResponse_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptValue.h"
 #include "bindings/core/v8/ScriptWrappable.h"
@@ skipping 13 matching lines @@
 
 class MODULES_EXPORT PaymentResponse final : public GarbageCollectedFinalized<PaymentResponse>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
     WTF_MAKE_NONCOPYABLE(PaymentResponse);
 
 public:
     PaymentResponse(mojom::blink::PaymentResponsePtr, PaymentCompleter*);
     virtual ~PaymentResponse();
 
     const String& methodName() const { return m_methodName; }
-    void totalAmount(PaymentCurrencyAmount& result) const { result = m_totalAmount; }
     ScriptValue details(ScriptState*, ExceptionState&) const;
     PaymentAddress* shippingAddress() const { return m_shippingAddress.get(); }
     const String& shippingOption() const { return m_shippingOption; }
     const String& payerEmail() const { return m_payerEmail; }
     const String& payerPhone() const { return m_payerPhone; }
 
     ScriptPromise complete(ScriptState*, const String& result = "");
 
     DECLARE_TRACE();
 
 private:
     String m_methodName;
-    PaymentCurrencyAmount m_totalAmount;
     String m_stringifiedDetails;
     Member<PaymentAddress> m_shippingAddress;
     String m_shippingOption;
     String m_payerEmail;
     String m_payerPhone;
     Member<PaymentCompleter> m_paymentCompleter;
 };
 
 } // namespace blink
 
 #endif // PaymentResponse_h