[DO NOT COMMIT] Trace events for layout-based First Meaningful Paint detection

third_party/WebKit/Source/core/css/FontFace.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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 32 matching lines @@
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class CSSFontFace;
 class CSSValue;
 class DOMArrayBuffer;
 class DOMArrayBufferView;
 class Document;
 class ExceptionState;
+class FontDescription;
 class FontFaceDescriptors;
 class StringOrArrayBufferOrArrayBufferView;
 class StylePropertySet;
 class StyleRuleFontFace;
 
 class FontFace : public GarbageCollectedFinalized<FontFace>, public ScriptWrappable, public ActiveScriptWrappable, public ActiveDOMObject {
     DEFINE_WRAPPERTYPEINFO();
     USING_GARBAGE_COLLECTED_MIXIN(FontFace);
 public:
     enum LoadStatusType { Unloaded, Loading, Loaded, Error };
@@ skipping 24 matching lines @@
     ScriptPromise loaded(ScriptState* scriptState) { return fontStatusPromise(scriptState); }
 
     ScriptPromise load(ScriptState*);
 
     LoadStatusType loadStatus() const { return m_status; }
     void setLoadStatus(LoadStatusType);
     void setError(DOMException* = nullptr);
     DOMException* error() const { return m_error; }
     FontTraits traits() const;
     CSSFontFace* cssFontFace() { return m_cssFontFace.get(); }
+    bool isBlank() const;
+    bool willUseFontData(const FontDescription&, const String& text);
 
     DECLARE_VIRTUAL_TRACE();
 
     bool hadBlankText() const;
 
     class LoadFontCallback : public GarbageCollectedFinalized<LoadFontCallback> {
     public:
         virtual ~LoadFontCallback() { }
         virtual void notifyLoaded(FontFace*) = 0;
         virtual void notifyError(FontFace*) = 0;
@@ skipping 31 matching lines @@
     Member<CSSValue> m_unicodeRange;
     Member<CSSValue> m_variant;
     Member<CSSValue> m_featureSettings;
     Member<CSSValue> m_display;
     LoadStatusType m_status;
     Member<DOMException> m_error;
 
     Member<LoadedProperty> m_loadedProperty;
     Member<CSSFontFace> m_cssFontFace;
     HeapVector<Member<LoadFontCallback>> m_callbacks;
+    unsigned m_charCount = 0;
 };
 
 using FontFaceArray = HeapVector<Member<FontFace>>;
 
 } // namespace blink
 
 #endif // FontFace_h