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

samplecode/SampleTiling.cpp

Index: samplecode/SampleTiling.cpp
diff --git a/samplecode/SampleTiling.cpp b/samplecode/SampleTiling.cpp
index 735b9907ef4e784776955cb59fef322189937192..7bacb8b81eb9b5c436b4cc090c6bf979fa293c01 100644
--- a/samplecode/SampleTiling.cpp
+++ b/samplecode/SampleTiling.cpp
@@ -62,23 +62,19 @@ static const int gWidth = 32;
 static const int gHeight = 32;
 
 class TilingView : public SampleView {
-    SkPicture*          fTextPicture;
-    SkBlurDrawLooper    fLooper;
+    SkAutoTUnref<SkPicture>         fTextPicture;
+    SkAutoTUnref<SkBlurDrawLooper>  fLooper;
 public:
     TilingView()
-            : fLooper(0x88000000,
-                      SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(1)),
-                      SkIntToScalar(2), SkIntToScalar(2)) {
-        fTextPicture = new SkPicture();
+            : fTextPicture(new SkPicture)
+            , fLooper(SkBlurDrawLooper::Create(0x88000000,
+                                               SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(1)),
+                                               SkIntToScalar(2), SkIntToScalar(2))) {
         for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) {
             makebm(&fTexture[i], gColorTypes[i], gWidth, gHeight);
         }
     }
 
-    ~TilingView() {
-        fTextPicture->unref();
-    }
-
     SkBitmap    fTexture[SK_ARRAY_COUNT(gColorTypes)];
 
 protected:
@@ -117,7 +113,7 @@ protected:
                     SkString str;
                     p.setAntiAlias(true);
                     p.setDither(true);
-                    p.setLooper(&fLooper);
+                    p.setLooper(fLooper);
                     str.printf("[%s,%s]", gModeNames[kx], gModeNames[ky]);
 
                     p.setTextAlign(SkPaint::kCenter_Align);
@@ -151,7 +147,7 @@ protected:
                     SkPaint p;
                     SkString str;
                     p.setAntiAlias(true);
-                    p.setLooper(&fLooper);
+                    p.setLooper(fLooper);
                     str.printf("%s, %s", gConfigNames[i], gFilterNames[j]);
                     textCanvas->drawText(str.c_str(), str.size(), x, y + r.height() * 2 / 3, p);
                 }