Add oblique as a slant.

src/ports/SkFontHost_FreeType.cpp

Index: src/ports/SkFontHost_FreeType.cpp
diff --git a/src/ports/SkFontHost_FreeType.cpp b/src/ports/SkFontHost_FreeType.cpp
index 3b1a5b207dca4c59c2c845f6f37310043398c410..82648c3f513452e2f717c4d7002106f601647ede 100644
--- a/src/ports/SkFontHost_FreeType.cpp
+++ b/src/ports/SkFontHost_FreeType.cpp
@@ -1696,6 +1696,11 @@ bool SkTypeface_FreeType::Scanner::scanFont(
     if (os2 && os2->version != 0xffff) {
         weight = os2->usWeightClass;
         width = os2->usWidthClass;
+
+        // OS/2::fsSelection bit 9 indicates oblique.
+        if (SkToBool(os2->fsSelection & (1u << 9))) {
+            slant = SkFontStyle::kOblique_Slant;
+        }
     } else if (0 == FT_Get_PS_Font_Info(face, &psFontInfo) && psFontInfo.weight) {
         static const struct {
             char const * const name;