Migrate WTF::HashSet::add() to ::insert() [part 1 of N]

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/ConditionalFeatures.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
@@ skipping 178 matching lines @@
       exceptionState.throwTypeError("ShippingOption id required");
       return;
     }
 
     if (uniqueIds.contains(option.id())) {
       // Clear |output| instead of throwing an exception.
       output.clear();
       return;
     }
 
-    uniqueIds.add(option.id());
+    uniqueIds.insert(option.id());
 
     validateShippingOptionOrPaymentItem(option, exceptionState);
     if (exceptionState.hadException())
       return;
 
     output.push_back(
         payments::mojom::blink::PaymentShippingOption::From(option));
   }
 }
 
@@ skipping 826 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