Revert[8] "replace SkXfermode obj with SkBlendMode enum in paints"

src/gpu/text/GrTextUtils.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrTextUtils.h"
 
 #include "GrAtlasTextBlob.h"
@@ skipping 529 matching lines @@
                 matrix[SkMatrix::kMTransY] = loc.fY;
                 GrBlurUtils::drawPathWithMaskFilter(context, dc, clip, *path, paint,
                                                     viewMatrix, &matrix, clipBounds, false);
             }
         }
         pos += scalarsPerPosition;
     }
 }
 
 bool GrTextUtils::ShouldDisableLCD(const SkPaint& paint) {
-    return !SkXfermode::AsMode(paint.getXfermode(), nullptr) ||
-           paint.getMaskFilter() ||
+    return paint.getMaskFilter() ||
            paint.getRasterizer() ||
            paint.getPathEffect() ||
            paint.isFakeBoldText() ||
            paint.getStyle() != SkPaint::kFill_Style;
 }
 
 uint32_t GrTextUtils::FilterTextFlags(const SkSurfaceProps& surfaceProps, const SkPaint& paint) {
     uint32_t flags = paint.getFlags();
 
     if (!paint.isLCDRenderText() || !paint.isAntiAlias()) {
         return flags;
     }
 
     if (kUnknown_SkPixelGeometry == surfaceProps.pixelGeometry() || ShouldDisableLCD(paint)) {
         flags &= ~SkPaint::kLCDRenderText_Flag;
         flags |= SkPaint::kGenA8FromLCD_Flag;
     }
 
     return flags;
 }