InlinedVisitor: Migrate encryptedmedia to use inlined tracing

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/Maplike.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "bindings/core/v8/UnionTypesCore.h"
@@ skipping 25 matching lines @@
 public:
     MediaKeyStatusMap() { }
 
     void clear();
     void addEntry(WebData source, const String& status);
     const MapEntry& at(size_t) const;
 
     // IDL attributes / methods
     size_t size() const { return m_entries.size(); }
 
-    virtual void trace(Visitor*);
+    DECLARE_VIRTUAL_TRACE();
 
 private:
     IterationSource* startIteration(ScriptState*, ExceptionState&) override;
     bool getMapEntry(ScriptState*, const ArrayBufferOrArrayBufferView&, String&, ExceptionState&) override;
 
     size_t indexOf(const DOMArrayPiece& key) const;
 
     MapType m_entries;
 };
 
 } // namespace blink
 
 #endif // MediaKeyStatusMap_h