Revert of Remove Mac native font type members from FontPlatformData

Source/platform/fonts/FontCustomPlatformData.h

Index: Source/platform/fonts/FontCustomPlatformData.h
diff --git a/Source/platform/fonts/FontCustomPlatformData.h b/Source/platform/fonts/FontCustomPlatformData.h
index 30f44b180014d6530223b2c13ee102d58df9b604..c2f7824767e492e52caa4ca54e74e8b394c3c77b 100644
--- a/Source/platform/fonts/FontCustomPlatformData.h
+++ b/Source/platform/fonts/FontCustomPlatformData.h
@@ -39,6 +39,12 @@
 #include "wtf/RefPtr.h"
 #include "wtf/text/WTFString.h"
 
+#if OS(MACOSX)
+#include "wtf/RetainPtr.h"
+#include <CoreFoundation/CFBase.h>
+typedef struct CGFont* CGFontRef;
+#endif
+
 class SkTypeface;
 
 namespace blink {
@@ -57,7 +63,12 @@
     static bool supportsFormat(const String&);
 
 private:
+#if OS(MACOSX)
+    explicit FontCustomPlatformData(CGFontRef, PassRefPtr<SkTypeface>);
+    RetainPtr<CGFontRef> m_cgFont;
+#else
     explicit FontCustomPlatformData(PassRefPtr<SkTypeface>);
+#endif
     RefPtr<SkTypeface> m_typeface;
 };