Reland of [2] of "switch colorfilters to sk_sp (patchset #11 id:200001 of https://codereview.chromium.o…

src/effects/SkDropShadowImageFilter.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 "SkDropShadowImageFilter.h"
 
 #include "SkBitmap.h"
@@ skipping 61 matching lines @@
     if (nullptr == device.get()) {
         return false;
     }
     SkCanvas canvas(device.get());
 
     SkVector sigma = SkVector::Make(fSigmaX, fSigmaY);
     ctx.ctm().mapVectors(&sigma, 1);
     sigma.fX = SkMaxScalar(0, sigma.fX);
     sigma.fY = SkMaxScalar(0, sigma.fY);
     SkAutoTUnref<SkImageFilter> blurFilter(SkBlurImageFilter::Create(sigma.fX, sigma.fY));
-    SkAutoTUnref<SkColorFilter> colorFilter(
-        SkColorFilter::CreateModeFilter(fColor, SkXfermode::kSrcIn_Mode));
     SkPaint paint;
     paint.setImageFilter(blurFilter.get());
-    paint.setColorFilter(colorFilter.get());
+    paint.setColorFilter(SkColorFilter::MakeModeFilter(fColor, SkXfermode::kSrcIn_Mode));
     paint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
     SkVector offsetVec = SkVector::Make(fDx, fDy);
     ctx.ctm().mapVectors(&offsetVec, 1);
     canvas.translate(SkIntToScalar(srcOffset.fX - bounds.fLeft),
                      SkIntToScalar(srcOffset.fY - bounds.fTop));
     canvas.drawBitmap(src, offsetVec.fX, offsetVec.fY, &paint);
     if (fShadowMode == kDrawShadowAndForeground_ShadowMode) {
         canvas.drawBitmap(src, 0, 0);
     }
     *result = device->accessBitmap(false);
@@ skipping 51 matching lines @@
         "kDrawShadowAndForeground", "kDrawShadowOnly"
     };
 
     static_assert(kShadowModeCount == SK_ARRAY_COUNT(gModeStrings), "enum_mismatch");
 
     str->appendf(" mode: %s", gModeStrings[fShadowMode]);
 
     str->append(")");
 }
 #endif