Make sure SkDrawLooper objects can only be allocated on the heap.

samplecode/SampleTextOnPath.cpp

Index: samplecode/SampleTextOnPath.cpp
diff --git a/samplecode/SampleTextOnPath.cpp b/samplecode/SampleTextOnPath.cpp
index f2b9af6732e92e89314f2c8240997920541fa692..6d79e2075517a1f3d034a956a0ea49b6767ae7d8 100644
--- a/samplecode/SampleTextOnPath.cpp
+++ b/samplecode/SampleTextOnPath.cpp
@@ -35,10 +35,10 @@ static void textStrokePath(SkCanvas* canvas) {
 
     canvas->drawPath(path, paint);
 
-    paint.setLooper(new SkBlurDrawLooper(SK_ColorBLACK,
-                                         SkBlurMask::ConvertRadiusToSigma(0.002f),
-                                         0.0f,
-                                         0.0f))->unref();
+    paint.setLooper(SkBlurDrawLooper::Create(SK_ColorBLACK,
+                                             SkBlurMask::ConvertRadiusToSigma(0.002f),
+                                             0.0f,
+                                             0.0f))->unref();
 
     const char* text = "DRAWING STROKED TEXT WITH A BLUR ON A PATH";
     size_t      len = strlen(text);