PaymentRequest: Deprecate careOf attribute in PaymentAddress.

third_party/WebKit/Source/modules/payments/PaymentAddress.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 PaymentAddress_h
 #define PaymentAddress_h
 
 #include "bindings/core/v8/ScriptValue.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "modules/ModulesExport.h"
@@ skipping 18 matching lines @@
     const String& country() const { return m_country; }
     const Vector<String>& addressLine() const { return m_addressLine; }
     const String& region() const { return m_region; }
     const String& city() const { return m_city; }
     const String& dependentLocality() const { return m_dependentLocality; }
     const String& postalCode() const { return m_postalCode; }
     const String& sortingCode() const { return m_sortingCode; }
     const String& languageCode() const { return m_languageCode; }
     const String& organization() const { return m_organization; }
     const String& recipient() const { return m_recipient; }
-    const String& careOf() const { return m_careOf; }
+    const String careOf() const { return WTF::emptyString(); }
     const String& phone() const { return m_phone; }
 
     DEFINE_INLINE_TRACE() {}
 
 private:
     String m_country;
     Vector<String> m_addressLine;
     String m_region;
     String m_city;
     String m_dependentLocality;
     String m_postalCode;
     String m_sortingCode;
     String m_languageCode;
     String m_organization;
     String m_recipient;
-    String m_careOf;
     String m_phone;
 };
 
 } // namespace blink
 
 #endif // PaymentAddress_h