Font variations.

src/ports/SkFontHost_FreeType_common.h

Index: src/ports/SkFontHost_FreeType_common.h
diff --git a/src/ports/SkFontHost_FreeType_common.h b/src/ports/SkFontHost_FreeType_common.h
index 857d2c89906655946986880fced4ec8ad9a4e4ef..8ae872c1dac58130894f93c2cb5c5103d9e72f96 100644
--- a/src/ports/SkFontHost_FreeType_common.h
+++ b/src/ports/SkFontHost_FreeType_common.h
@@ -43,9 +43,17 @@ public:
     public:
         Scanner();
         ~Scanner();
+        struct AxisDefinition {
+            SkFourByteTag fTag;
+            SkFixed fMinimum;
+            SkFixed fDefault;
+            SkFixed fMaximum;
+        };
+        using AxisDefinitions = SkSTArray<4, AxisDefinition, true>;
         bool recognizedFont(SkStream* stream, int* numFonts) const;
         bool scanFont(SkStream* stream, int ttcIndex,
-                      SkString* name, SkFontStyle* style, bool* isFixedPitch) const;
+                      SkString* name, SkFontStyle* style, bool* isFixedPitch,
+                      AxisDefinitions* axes) const;
     private:
         FT_Face openFace(SkStream* stream, int ttcIndex, FT_Stream ftStream) const;
         FT_Library fLibrary;