Revert of Fix color emoji. (patchset #11 id:320001 of https://codereview.chromium.org/636183005/)

Reason for revert:
Crashing the Windows bots.

Original issue's description:
> Fix color emoji.
>
> Removes the GrMaskFormat and single atlas in GrTextStrike.
> Replaces it by storing the GrMaskFormat in each GrGlyph, and
> doing a lookup for the correct atlas based on that.
>
> Disables color glyph rendering in GrDistanceFieldTextContext
> for now.
>
> BUG=skia:2887
>
> Committed: https://skia.googlesource.com/skia/+/bc92163ddfe957ad6ffbb02ac40e0ba75ff82216

TBR=robertphillips@google.com,bungeman@google.com,reed@google.com,bsalomon@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:2887

Review URL: https://codereview.chromium.org/640413004
diff --git a/src/gpu/GrBitmapTextContext.h b/src/gpu/GrBitmapTextContext.h
index a9805cb..4bff399 100644
--- a/src/gpu/GrBitmapTextContext.h
+++ b/src/gpu/GrBitmapTextContext.h
@@ -40,14 +40,13 @@
 
     GrTextStrike*                     fStrike;
     void*                             fVertices;
-    int                               fCurrVertex;
-    int                               fMaxVertices;
-    SkRect                            fVertexBounds;
+    int32_t                           fMaxVertices;
     GrTexture*                        fCurrTexture;
-    GrMaskFormat                      fCurrMaskFormat;
     SkAutoTUnref<GrGeometryProcessor> fCachedGeometryProcessor;
     // Used to check whether fCachedEffect is still valid.
     uint32_t                          fEffectTextureUniqueID;
+    int                               fCurrVertex;
+    SkRect                            fVertexBounds;
 
     void init(const GrPaint&, const SkPaint&);
     void appendGlyph(GrGlyph::PackedID, SkFixed left, SkFixed top, GrFontScaler*);