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

src/effects/SkImageSource.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 "SkImageSource.h"
 
 #include "SkCanvas.h"
@@ skipping 90 matching lines @@
     SkCanvas* canvas = surf->getCanvas();
     SkASSERT(canvas);
 
     // TODO: it seems like this clear shouldn't be necessary (see skbug.com/5075)
     canvas->clear(0x0);
 
     SkPaint paint;
 
     // Subtract off the integer component of the translation (will be applied in offset, below).
     dstRect.offset(-SkIntToScalar(dstIRect.fLeft), -SkIntToScalar(dstIRect.fTop));
-    paint.setXfermodeMode(SkXfermode::kSrc_Mode);
+    paint.setBlendMode(SkBlendMode::kSrc);
     // FIXME: this probably shouldn't be necessary, but drawImageRect asserts
     // None filtering when it's translate-only
     paint.setFilterQuality(
         fSrcRect.width() == dstRect.width() && fSrcRect.height() == dstRect.height() ?
                kNone_SkFilterQuality : fFilterQuality);
     canvas->drawImageRect(fImage.get(), fSrcRect, dstRect, &paint,
                           SkCanvas::kStrict_SrcRectConstraint);
 
     offset->fX = dstIRect.fLeft;
     offset->fY = dstIRect.fTop;
     return surf->makeImageSnapshot();
 }
 
 SkRect SkImageSource::computeFastBounds(const SkRect& src) const {
     return fDstRect;
 }
 
 #ifndef SK_IGNORE_TO_STRING
 void SkImageSource::toString(SkString* str) const {
     str->appendf("SkImageSource: (");
     str->appendf("src: (%f,%f,%f,%f) dst: (%f,%f,%f,%f) ",
                  fSrcRect.fLeft, fSrcRect.fTop, fSrcRect.fRight, fSrcRect.fBottom,
                  fDstRect.fLeft, fDstRect.fTop, fDstRect.fRight, fDstRect.fBottom);
     str->appendf("image: (%d,%d)",
                  fImage->width(), fImage->height());
     str->append(")");
 }
 #endif