Revert of Finish conversion to sk_sp<SkShader> (patchset #2 id:20001 of https://codereview.chromium.org/1803763002/ )

Reason for revert:
need to update cmake build example

Original issue's description:
> Finish conversion to sk_sp<SkShader>
>
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1803763002
>
> TBR=
>
> Committed: https://skia.googlesource.com/skia/+/15c3a0e55bd9134dace0ace2fffb855a0f09542f

TBR=
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1798133003

1 files changed, 11 insertions, 5 deletions

diff --git a/example/HelloWorld.cpp b/example/HelloWorld.cpp
index e30c4674e8..e13cb3b438 100644
--- a/example/HelloWorld.cpp
+++ b/example/HelloWorld.cpp
@@ -93,7 +93,10 @@ void HelloWorldWindow::drawContents(SkCanvas* canvas) {
     paint.setColor(SK_ColorRED);
 
     // Draw a rectangle with red paint
-    SkRect rect = SkRect::MakeXYWH(10, 10, 128, 128);
+    SkRect rect = {
+            10, 10,
+            128, 128
+    };
     canvas->drawRect(rect, paint);
 
     // Set up a linear gradient and draw a circle
@@ -104,15 +107,18 @@ void HelloWorldWindow::drawContents(SkCanvas* canvas) {
         };
         SkColor linearColors[] = {SK_ColorGREEN, SK_ColorBLACK};
 
-        paint.setShader(SkGradientShader::MakeLinear(
-                linearPoints, linearColors, nullptr, 2,
-                SkShader::kMirror_TileMode));
+        SkShader* shader = SkGradientShader::CreateLinear(
+                linearPoints, linearColors, NULL, 2,
+                SkShader::kMirror_TileMode);
+        SkAutoUnref shader_deleter(shader);
+
+        paint.setShader(shader);
         paint.setFlags(SkPaint::kAntiAlias_Flag);
 
         canvas->drawCircle(200, 200, 64, paint);
 
         // Detach shader
-        paint.setShader(nullptr);
+        paint.setShader(NULL);
     }
 
     // Draw a message with a nice black paint.