Move makeFontData to SkTypeface_FreeType.

SkTypeface_FreeType uses SkFontData and makeFontData as a way to lazily
create FT_Face objects. Other SkTypeface types do not need this, so
remove it.

Change-Id: I2f2f829deac9f7f6aac06f9ce84f856922d8a861
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/299443
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index f3a10ca..d07e57a 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -883,6 +883,7 @@
   sources = [
     "src/ports/SkFontHost_FreeType.cpp",
     "src/ports/SkFontHost_FreeType_common.cpp",
+    "src/ports/SkFontHost_FreeType_common.h",
   ]
 }