blink: Cleanup class/struct forward declarations

third_party/WebKit/Source/modules/nfc/NFC.h

 // Copyright 2015 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 NFC_h
 #define NFC_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "bindings/modules/v8/StringOrArrayBufferOrNFCMessage.h"
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/page/PageVisibilityObserver.h"
 #include "device/nfc/nfc.mojom-blink.h"
 #include "modules/nfc/MessageCallback.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "wtf/HashMap.h"
 
 namespace blink {
 
 class MessageCallback;
-class NFCError;
 class NFCPushOptions;
 using NFCPushMessage = StringOrArrayBufferOrNFCMessage;
 class NFCWatchOptions;
 
 class NFC final : public GarbageCollectedFinalized<NFC>,
                   public ScriptWrappable,
                   public PageVisibilityObserver,
                   public ContextLifecycleObserver,
                   public device::nfc::mojom::blink::NFCClient {
   DEFINE_WRAPPERTYPEINFO();
@@ skipping 55 matching lines @@
   device::nfc::mojom::blink::NFCPtr m_nfc;
   mojo::Binding<device::nfc::mojom::blink::NFCClient> m_client;
   HeapHashSet<Member<ScriptPromiseResolver>> m_requests;
   using WatchCallbacksMap = HeapHashMap<uint32_t, Member<MessageCallback>>;
   WatchCallbacksMap m_callbacks;
 };
 
 }  // namespace blink
 
 #endif  // NFC_h