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

samplecode/SampleTextOnPath.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SampleCode.h"
 #include "SkBlurMask.h"
 #include "SkBlurDrawLooper.h"
@@ skipping 17 matching lines @@
     path.addArc(rect, SkIntToScalar(280), SkIntToScalar(350));
 
     paint.setAntiAlias(true);
     paint.setStyle(SkPaint::kStroke_Style);
     paint.setColor(0xFFFF0000);
     paint.setTextSize(0.085f);
     paint.setStrokeWidth(.005f);
 
     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);
 
     canvas->drawTextOnPathHV(text, len, path, 0,
                              -0.025f, paint);
     canvas->restore();
 }
 
 static void textPathMatrix(SkCanvas* canvas) {
@@ skipping 114 matching lines @@
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() {
     return new TextOnPathView;
 }
 
 static SkViewRegister reg(MyFactory);