Add oblique as a slant.

src/ports/SkFontHost_FreeType.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkAdvancedTypefaceMetrics.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
@@ skipping 1678 matching lines @@
     }
     if (face->style_flags & FT_STYLE_FLAG_ITALIC) {
         slant = SkFontStyle::kItalic_Slant;
     }
 
     PS_FontInfoRec psFontInfo;
     TT_OS2* os2 = static_cast<TT_OS2*>(FT_Get_Sfnt_Table(face, ft_sfnt_os2));
     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;
             int const weight;
         } commonWeights [] = {
             // There are probably more common names, but these are known to exist.
             { "all", SkFontStyle::kNormal_Weight }, // Multiple Masters usually default to normal.
             { "black", SkFontStyle::kBlack_Weight },
             { "bold", SkFontStyle::kBold_Weight },
             { "book", (SkFontStyle::kNormal_Weight + SkFontStyle::kLight_Weight)/2 },
@@ skipping 110 matching lines @@
                 SkDEBUGF(("Requested font axis not found: %s '%c%c%c%c'\n",
                           name.c_str(),
                           (skTag >> 24) & 0xFF,
                           (skTag >> 16) & 0xFF,
                           (skTag >>  8) & 0xFF,
                           (skTag)       & 0xFF));
             }
         }
     )
 }