Allow creating font data while FontResource is revalidating

third_party/WebKit/Source/core/loader/resource/FontResource.h

 /*
  * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 42 matching lines @@
 
   void setRevalidatingRequest(const ResourceRequest&) override;
 
   void allClientsAndObserversRemoved() override;
   void startLoadLimitTimers();
 
   void setCORSFailed() override { m_corsFailed = true; }
   bool isCORSFailed() const { return m_corsFailed; }
   String otsParsingMessage() const { return m_otsParsingMessage; }
 
+  bool hasCustomFontData() const { return static_cast<bool>(m_fontData); }
   bool ensureCustomFontData();
   FontPlatformData platformDataFromCustomData(
       float size,
       bool bold,
       bool italic,
       FontOrientation = FontOrientation::Horizontal);
 
   // Returns true if the loading priority of the remote font resource can be
   // lowered. The loading priority of the font can be lowered only if the
   // font is not needed for painting the text.
@@ skipping 53 matching lines @@
     // Only the RemoteFontFaceSources clients can prevent lowering of loading
     // priority of the remote fonts.  Set the default to true to prevent
     // other clients from incorrectly returning false.
     return true;
   }
 };
 
 }  // namespace blink
 
 #endif