Remove Mac native font type members from FontPlatformData

Source/web/mac/WebSubstringUtil.mm

Index: Source/web/mac/WebSubstringUtil.mm
diff --git a/Source/web/mac/WebSubstringUtil.mm b/Source/web/mac/WebSubstringUtil.mm
index 14d2d356252c3a029114a51dd525f5783e01771a..db4044880409e6d91f9d6076ac294914fee0a5da 100644
--- a/Source/web/mac/WebSubstringUtil.mm
+++ b/Source/web/mac/WebSubstringUtil.mm
@@ -78,7 +78,8 @@ static NSAttributedString* attributedSubstringFromRange(const Range* range)
             continue;
 
         LayoutStyle* style = renderer->style();
-        NSFont* font = style->font().primaryFont()->getNSFont();
+        const FontPlatformData& fontPlatformData = style->font().primaryFont()->platformData();
+        const NSFont* font = reinterpret_cast<const NSFont*>(fontPlatformData.ctFont());
         // If the platform font can't be loaded, it's likely that the site is
         // using a web font. For now, just use the default font instead.
         // TODO(rsesek): Change the font activation flags to allow other processes