Allow creating font data while FontResource is revalidating

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

Index: third_party/WebKit/Source/core/loader/resource/FontResource.h
diff --git a/third_party/WebKit/Source/core/loader/resource/FontResource.h b/third_party/WebKit/Source/core/loader/resource/FontResource.h
index 2e1fffa3b97e4657d72b4d00d4d680a358a998e6..a6afc64226d6b07c6cb67a53e77838e295cbace0 100644
--- a/third_party/WebKit/Source/core/loader/resource/FontResource.h
+++ b/third_party/WebKit/Source/core/loader/resource/FontResource.h
@@ -60,6 +60,7 @@ class CORE_EXPORT FontResource final : public Resource {
   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,