Create platform/mojo and move MojoHelper.h there

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/JSONValuesForV8.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "core/EventTypeNames.h"
 #include "core/dom/DOMException.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/events/Event.h"
 #include "core/events/EventQueue.h"
 #include "modules/EventTargetModulesNames.h"
 #include "modules/payments/PaymentItem.h"
 #include "modules/payments/PaymentResponse.h"
 #include "modules/payments/PaymentsValidators.h"
 #include "modules/payments/ShippingAddress.h"
 #include "modules/payments/ShippingOption.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "mojo/public/cpp/bindings/wtf_array.h"
-#include "platform/MojoHelper.h"
+#include "platform/mojo/MojoHelper.h"
 #include "public/platform/ServiceRegistry.h"
 #include <utility>
 
 namespace mojo {
 
 using blink::mojom::wtf::CurrencyAmount;
 using blink::mojom::wtf::CurrencyAmountPtr;
 using blink::mojom::wtf::PaymentDetails;
 using blink::mojom::wtf::PaymentDetailsPtr;
 using blink::mojom::wtf::PaymentItem;
@@ skipping 330 matching lines @@
 void PaymentRequest::cleanUp()
 {
     m_completeResolver.clear();
     m_showResolver.clear();
     if (m_clientBinding.is_bound())
         m_clientBinding.Close();
     m_paymentProvider.reset();
 }
 
 } // namespace blink