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

samplecode/SampleLayers.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SampleCode.h"
 #include "SkView.h"
 #include "SkCanvas.h"
@@ skipping 13 matching lines @@
 #include "SkUtils.h"
 #include "SkKey.h"
 #include "SkXfermode.h"
 #include "SkDrawFilter.h"
 
 static void make_paint(SkPaint* paint, const SkMatrix& localMatrix) {
     SkColor colors[] = { 0, SK_ColorWHITE };
     SkPoint pts[] = { { 0, 0 }, { 0, SK_Scalar1*20 } };
     paint->setShader(SkGradientShader::MakeLinear(pts, colors, nullptr, 2,
                                                   SkShader::kClamp_TileMode, 0, &localMatrix));
-    paint->setXfermodeMode(SkXfermode::kDstIn_Mode);
+    paint->setBlendMode(SkBlendMode::kDstIn);
 }
 
 // test drawing with strips of fading gradient above and below
 static void test_fade(SkCanvas* canvas) {
     SkAutoCanvasRestore ar(canvas, true);
 
     SkRect r;
 
     SkPaint p;
     p.setAlpha(0x88);
@@ skipping 89 matching lines @@
         this->drawBG(canvas);
 
         if (true) {
             SkRect r;
             r.set(SkIntToScalar(0), SkIntToScalar(0),
                   SkIntToScalar(220), SkIntToScalar(120));
             SkPaint p;
             canvas->saveLayer(&r, &p);
             canvas->drawColor(0xFFFF0000);
             p.setAlpha(0);  // or 0
-            p.setXfermodeMode(SkXfermode::kSrc_Mode);
+            p.setBlendMode(SkBlendMode::kSrc);
             canvas->drawOval(r, p);
             canvas->restore();
             return;
         }
 
         if (false) {
             SkRect r;
             r.set(SkIntToScalar(0), SkIntToScalar(0),
                   SkIntToScalar(220), SkIntToScalar(120));
             SkPaint p;
@@ skipping 123 matching lines @@
     bool onClick(Click* click) override {
         this->inval(nullptr);
         fCenter = click->fCurr;
         return this->INHERITED::onClick(click);
     }
 
 private:
     typedef SampleView INHERITED;
 };
 DEF_SAMPLE( return new BackdropView; )