Implement API for accessing fonts installed locally on the system.

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

 /*
  * Copyright (C) 2013 Google 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 62 matching lines @@
 public:
     ~FontFaceSet() override;
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(loading);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(loadingdone);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(loadingerror);
 
     bool check(const String& font, const String& text, ExceptionState&);
     ScriptPromise load(ScriptState*, const String& font, const String& text);
     ScriptPromise ready(ScriptState*);
+    static ScriptPromise systemFonts(ScriptState*);
 
     PassRefPtrWillBeRawPtr<FontFaceSet> addForBinding(ScriptState*, FontFace*, ExceptionState&);
     void clearForBinding(ScriptState*, ExceptionState&);
     bool deleteForBinding(ScriptState*, FontFace*, ExceptionState&);
     bool hasForBinding(ScriptState*, FontFace*, ExceptionState&) const;
 
     size_t size() const;
     AtomicString status() const;
 
     ExecutionContext* executionContext() const override;
@@ skipping 84 matching lines @@
     WillBeHeapListHashSet<RefPtrWillBeMember<FontFace>> m_nonCSSConnectedFaces;
 
     PersistentWillBeMember<AsyncMethodRunner<FontFaceSet>> m_asyncRunner;
 
     FontLoadHistogram m_histogram;
 };
 
 } // namespace blink
 
 #endif // FontFaceSet_h