Use Skia's matchFamilyStyleCharacter API for font fallback

third_party/WebKit/Source/platform/fonts/FontDescription.cpp

Index: third_party/WebKit/Source/platform/fonts/FontDescription.cpp
diff --git a/third_party/WebKit/Source/platform/fonts/FontDescription.cpp b/third_party/WebKit/Source/platform/fonts/FontDescription.cpp
index ee19f799bb01ac5ca8cd3efab671b28427bb84d3..cde54996f91e78b47033a4320ff8b9765813cfd4 100644
--- a/third_party/WebKit/Source/platform/fonts/FontDescription.cpp
+++ b/third_party/WebKit/Source/platform/fonts/FontDescription.cpp
@@ -278,4 +278,22 @@ unsigned FontDescription::styleHashWithoutFamilyList() const
     return hash;
 }
 
+SkFontStyle FontDescription::skiaFontStyle() const
+{
+    int width = static_cast<int>(stretch());
+    SkFontStyle::Slant slant = style() == FontStyleItalic
+        ? SkFontStyle::kItalic_Slant
+        : SkFontStyle::kUpright_Slant;
+    return SkFontStyle(numericFontWeight(weight()), width, slant);
+    static_assert(
+        static_cast<int>(FontStretchUltraCondensed) == static_cast<int>(SkFontStyle::kUltraCondensed_Width),
+        "FontStretchUltraCondensed should map to kUltraCondensed_Width");
+    static_assert(
+        static_cast<int>(FontStretchNormal) == static_cast<int>(SkFontStyle::kNormal_Width),
+        "FontStretchNormal should map to kNormal_Width");
+    static_assert(
+        static_cast<int>(FontStretchUltraExpanded) == static_cast<int>(SkFontStyle::kUltaExpanded_Width),
+        "FontStretchUltraExpanded should map to kUltaExpanded_Width");
+}
+
 } // namespace blink