Remove distance field generation and storage from SkGlyphCache.

src/core/SkGlyph.h

Index: src/core/SkGlyph.h
diff --git a/src/core/SkGlyph.h b/src/core/SkGlyph.h
index 4761adf0d22659451cabc1599ffcdea1fa701916..9abefa84c7578f450cce93460a109e95e3f0bca4 100644
--- a/src/core/SkGlyph.h
+++ b/src/core/SkGlyph.h
@@ -29,7 +29,6 @@ struct SkGlyph {
     uint16_t    fWidth, fHeight;
     int16_t     fTop, fLeft;
 
-    void*       fDistanceField;
     uint8_t     fMaskFormat;
     int8_t      fRsbDelta, fLsbDelta;  // used by auto-kerning
     int8_t      fForceBW;
@@ -38,7 +37,6 @@ struct SkGlyph {
         fID             = id;
         fImage          = NULL;
         fPath           = NULL;
-        fDistanceField  = NULL;
         fMaskFormat     = MASK_FORMAT_UNKNOWN;
         fForceBW        = 0;
     }