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

src/effects/SkLightingImageFilter.cpp

 /*
  * Copyright 2012 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkLightingImageFilter.h"
 #include "SkBitmap.h"
 #include "SkColorPriv.h"
@@ skipping 378 matching lines @@
                                              const SkRect& dstRect,
                                              BoundaryMode boundaryMode,
                                              const SkIRect* srcBounds,
                                              const SkIRect& bounds) const {
     SkRect srcRect = dstRect.makeOffset(SkIntToScalar(bounds.x()), SkIntToScalar(bounds.y()));
     GrPaint paint;
     paint.setGammaCorrect(drawContext->isGammaCorrect());
     sk_sp<GrFragmentProcessor> fp(this->makeFragmentProcessor(src, matrix, srcBounds,
                                                               boundaryMode));
     paint.addColorFragmentProcessor(std::move(fp));
-    paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);
+    paint.setPorterDuffXPFactory(SkBlendMode::kSrc);
     drawContext->fillRectToRect(clip, paint, SkMatrix::I(), dstRect, srcRect);
 }
 
 sk_sp<SkSpecialImage> SkLightingImageFilterInternal::filterImageGPU(
                                                    SkSpecialImage* source,
                                                    SkSpecialImage* input,
                                                    const SkIRect& offsetBounds,
                                                    const SkMatrix& matrix,
                                                    const OutputProperties& outputProperties) const {
     SkASSERT(source->isTextureBacked());
@@ skipping 1764 matching lines @@
 
     fragBuilder->codeAppendf("%s(%s)", fLightColorFunc.c_str(), surfaceToLight);
 }
 
 #endif
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkLightingImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkDiffuseLightingImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkSpecularLightingImageFilter)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END