Reland of "more shader-->sp conversions (patchset #5 id:80001 of https://codereview.chromium.org/1789633002/ )"

This reverts commit 9283d20afc27571f7a871d1bd1100dd5df584941.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1793303002

Review URL: https://codereview.chromium.org/1793303002
diff --git a/tests/PictureTest.cpp b/tests/PictureTest.cpp
index 448e079..3654a77 100644
--- a/tests/PictureTest.cpp
+++ b/tests/PictureTest.cpp
@@ -79,10 +79,9 @@
         bitmap.allocPixels(SkImageInfo::MakeN32Premul(2, 2));
         bitmap.eraseColor(SK_ColorBLUE);
         *(bitmap.getAddr32(0, 0)) = SK_ColorGREEN;
-        SkShader* shader = SkShader::CreateBitmapShader(bitmap, SkShader::kClamp_TileMode,
-                                                        SkShader::kClamp_TileMode);
-        paint.setShader(shader)->unref();
-        REPORTER_ASSERT(reporter, shader->isABitmap());
+        paint.setShader(SkShader::MakeBitmapShader(bitmap, SkShader::kClamp_TileMode,
+                                                   SkShader::kClamp_TileMode));
+        REPORTER_ASSERT(reporter, paint.getShader()->isABitmap());
 
         canvas->drawRect(SkRect::MakeWH(10, 10), paint);
     }
@@ -1389,7 +1388,7 @@
 DEF_TEST(MiniRecorderLeftHanging, r) {
     // Any shader or other ref-counted effect will do just fine here.
     SkPaint paint;
-    paint.setShader(SkShader::CreateColorShader(SK_ColorRED))->unref();
+    paint.setShader(SkShader::MakeColorShader(SK_ColorRED));
 
     SkMiniRecorder rec;
     REPORTER_ASSERT(r, rec.drawRect(SkRect::MakeWH(20,30), paint));