Factory methods for heap-allocated SkImageFilter objects.

gm/morphology.cpp

Index: gm/morphology.cpp
diff --git a/gm/morphology.cpp b/gm/morphology.cpp
index a2206b8f522b8e6c9c15335cd0f55428af2c6c5b..0b4d3af224b96941973dd40dd65b89a8b27525a8 100644
--- a/gm/morphology.cpp
+++ b/gm/morphology.cpp
@@ -74,13 +74,13 @@ protected:
             for (unsigned i = 0; i < SK_ARRAY_COUNT(samples); ++i) {
                 const SkImageFilter::CropRect* cr = j & 0x02 ? &cropRect : NULL;
                 if (j & 0x01) {
-                    paint.setImageFilter(new SkErodeImageFilter(
+                    paint.setImageFilter(SkErodeImageFilter::Create(
                         samples[i].fRadiusX,
                         samples[i].fRadiusY,
                         NULL,
                         cr))->unref();
                 } else {
-                    paint.setImageFilter(new SkDilateImageFilter(
+                    paint.setImageFilter(SkDilateImageFilter::Create(
                         samples[i].fRadiusX,
                         samples[i].fRadiusY,
                         NULL,