RemoteFontFaceSource should keep FontCustomPlatformData over FontResource revalidation

third_party/WebKit/Source/core/css/BinaryDataFontFaceSource.h

 // Copyright 2014 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 BinaryDataFontFaceSource_h
 #define BinaryDataFontFaceSource_h
 
 #include "core/css/CSSFontFaceSource.h"
-#include <memory>
+#include "wtf/RefPtr.h"
 
 namespace blink {
 
 class FontCustomPlatformData;
 class SharedBuffer;
 
 class BinaryDataFontFaceSource final : public CSSFontFaceSource {
  public:
   BinaryDataFontFaceSource(SharedBuffer*, String&);
   ~BinaryDataFontFaceSource() override;
   bool isValid() const override;
 
  private:
   PassRefPtr<SimpleFontData> createFontData(const FontDescription&) override;
 
-  std::unique_ptr<FontCustomPlatformData> m_customPlatformData;
+  RefPtr<FontCustomPlatformData> m_customPlatformData;
 };
 
 }  // namespace blink
 
 #endif