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

src/effects/SkTileImageFilter.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkTileImageFilter.h"
 
 #include "SkCanvas.h"
@@ skipping 69 matching lines @@
     } else {
         sk_sp<SkSurface> surf(input->makeTightSurface(ctx.outputProperties(), srcIRect.size()));
         if (!surf) {
             return nullptr;
         }
 
         SkCanvas* canvas = surf->getCanvas();
         SkASSERT(canvas);
 
         SkPaint paint;
-        paint.setXfermodeMode(SkXfermode::kSrc_Mode);
+        paint.setBlendMode(SkBlendMode::kSrc);
 
         input->draw(canvas, 
                     SkIntToScalar(inputOffset.x()), SkIntToScalar(inputOffset.y()),
                     &paint);
 
         subset = surf->makeImageSnapshot();
     }
     SkASSERT(subset->width() == srcIRect.width());
     SkASSERT(subset->height() == srcIRect.height());
 
     sk_sp<SkSpecialSurface> surf(source->makeSurface(ctx.outputProperties(), dstIRect.size()));
     if (!surf) {
         return nullptr;
     }
 
     SkCanvas* canvas = surf->getCanvas();
     SkASSERT(canvas);
 
     SkPaint paint;
-    paint.setXfermodeMode(SkXfermode::kSrc_Mode);
+    paint.setBlendMode(SkBlendMode::kSrc);
     paint.setShader(subset->makeShader(SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode));
     canvas->translate(-dstRect.fLeft, -dstRect.fTop);
     canvas->drawRect(dstRect, paint);
     offset->fX = dstIRect.fLeft;
     offset->fY = dstIRect.fTop;
     return surf->makeImageSnapshot();
 }
 
 SkIRect SkTileImageFilter::onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm,
                                               MapDirection direction) const {
@@ skipping 33 matching lines @@
     str->appendf(" dst: %.2f %.2f %.2f %.2f",
                  fDstRect.fLeft, fDstRect.fTop, fDstRect.fRight, fDstRect.fBottom);
     if (this->getInput(0)) {
         str->appendf("input: (");
         this->getInput(0)->toString(str);
         str->appendf(")");
     }
     str->append(")");
 }
 #endif