Add oblique as a slant.

src/ports/SkFontMgr_custom.cpp

Index: src/ports/SkFontMgr_custom.cpp
diff --git a/src/ports/SkFontMgr_custom.cpp b/src/ports/SkFontMgr_custom.cpp
index 20d6f78f7e801ed1800c426f97cd708d90f631c9..6401d5591432c25290f0f9b1b9825d94d61c6e58 100644
--- a/src/ports/SkFontMgr_custom.cpp
+++ b/src/ports/SkFontMgr_custom.cpp
@@ -149,7 +149,7 @@ public:
     static int match_score(const SkFontStyle& pattern, const SkFontStyle& candidate) {
         int score = 0;
         score += (pattern.width() - candidate.width()) * 100;
-        score += (pattern.isItalic() == candidate.isItalic()) ? 0 : 1000;
+        score += (pattern.slant() == candidate.slant()) ? 0 : 1000;
         score += pattern.weight() - candidate.weight();
         return score;
     }