Implement API for accessing fonts installed locally on the system.

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

Index: third_party/WebKit/Source/core/css/FontFace.h
diff --git a/third_party/WebKit/Source/core/css/FontFace.h b/third_party/WebKit/Source/core/css/FontFace.h
index ce45e44282cd39d244dc65e8a07490183c7f78d2..36a1989731a3ac90306384ab9673f9478fca0c55 100644
--- a/third_party/WebKit/Source/core/css/FontFace.h
+++ b/third_party/WebKit/Source/core/css/FontFace.h
@@ -95,6 +95,7 @@ public:
     DOMException* error() const { return m_error; }
     FontTraits traits() const;
     CSSFontFace* cssFontFace() { return m_cssFontFace.get(); }
+    ScriptPromise binaryData(ScriptState*) const;
 
     DECLARE_VIRTUAL_TRACE();
 
@@ -112,15 +113,17 @@ public:
     // ActiveDOMObject
     bool hasPendingActivity() const override;
 
+protected:
+    void initCSSFontFace(Document*, PassRefPtrWillBeRawPtr<CSSValue> src);
+    FontFace(ExecutionContext*, const AtomicString& family, const FontFaceDescriptors&);
+
 private:
     static PassRefPtrWillBeRawPtr<FontFace> create(ExecutionContext*, const AtomicString& family, PassRefPtr<DOMArrayBuffer> source, const FontFaceDescriptors&);
     static PassRefPtrWillBeRawPtr<FontFace> create(ExecutionContext*, const AtomicString& family, PassRefPtr<DOMArrayBufferView>, const FontFaceDescriptors&);
     static PassRefPtrWillBeRawPtr<FontFace> create(ExecutionContext*, const AtomicString& family, const String& source, const FontFaceDescriptors&);
 
     explicit FontFace(ExecutionContext*);
-    FontFace(ExecutionContext*, const AtomicString& family, const FontFaceDescriptors&);
 
-    void initCSSFontFace(Document*, PassRefPtrWillBeRawPtr<CSSValue> src);
     void initCSSFontFace(const unsigned char* data, size_t);
     void setPropertyFromString(const Document*, const String&, CSSPropertyID, ExceptionState* = 0);
     bool setPropertyFromStyle(const StylePropertySet&, CSSPropertyID);