Replace SkTypeface::Style with SkFontStyle.

include/ports/SkFontStyle.h

-/*
- * Copyright 2013 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef SkFontStyle_DEFINED
-#define SkFontStyle_DEFINED
-
-#include "SkTypes.h"
-
-class SK_API SkFontStyle {
-public:
-    enum Weight {
-        kThin_Weight        = 100,
-        kExtraLight_Weight  = 200,
-        kLight_Weight       = 300,
-        kNormal_Weight      = 400,
-        kMedium_Weight      = 500,
-        kSemiBold_Weight    = 600,
-        kBold_Weight        = 700,
-        kExtraBold_Weight   = 800,
-        kBlack_Weight       = 900
-    };
-
-    enum Width {
-        kUltraCondensed_Width   = 1,
-        kExtraCondensed_Width   = 2,
-        kCondensed_Width        = 3,
-        kSemiCondensed_Width    = 4,
-        kNormal_Width           = 5,
-        kSemiExpanded_Width     = 6,
-        kExpanded_Width         = 7,
-        kExtraExpanded_Width    = 8,
-        kUltaExpanded_Width     = 9
-    };
-
-    enum Slant {
-        kUpright_Slant,
-        kItalic_Slant,
-    };
-
-    SkFontStyle();
-    SkFontStyle(int weight, int width, Slant);
-
-    bool operator==(const SkFontStyle& rhs) const {
-        return fUnion.fU32 == rhs.fUnion.fU32;
-    }
-
-    int weight() const { return fUnion.fR.fWeight; }
-    int width() const { return fUnion.fR.fWidth; }
-    Slant slant() const { return (Slant)fUnion.fR.fSlant; }
-
-    bool isItalic() const {
-        return kItalic_Slant == fUnion.fR.fSlant;
-    }
-
-private:
-    union {
-        struct {
-            uint16_t fWeight;   // 100 .. 900
-            uint8_t  fWidth;    // 1 .. 9
-            uint8_t  fSlant;    // 0 .. 2
-        } fR;
-        uint32_t    fU32;
-    } fUnion;
-};
-
-#endif