blink: Cleanup class forward declarations

third_party/WebKit/Source/modules/encryptedmedia/MediaKeyStatusMap.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 MediaKeyStatusMap_h
 #define MediaKeyStatusMap_h
 
 #include "bindings/core/v8/Iterable.h"
 #include "bindings/core/v8/ScriptValue.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/dom/DOMArrayPiece.h"
 #include "platform/heap/Heap.h"
 
 namespace blink {
 
 class ExceptionState;
-class Iterator;
 class ScriptState;
 class WebData;
 
 // Represents a read-only map (to JavaScript) of key IDs and their current
 // status known to a particular session. Since it can be updated any time there
 // is a keychange event, iteration order and completeness is not guaranteed
 // if the event loop runs.
 class MediaKeyStatusMap final
     : public GarbageCollected<MediaKeyStatusMap>,
       public ScriptWrappable,
@@ skipping 28 matching lines @@
   IterationSource* startIteration(ScriptState*, ExceptionState&) override;
 
   size_t indexOf(const DOMArrayPiece& keyId) const;
 
   MediaKeyStatusMapType m_entries;
 };
 
 }  // namespace blink
 
 #endif  // MediaKeyStatusMap_h