Wrap GrEffects in GrEffectPtr.

This is the first step towards automatic recycling of scratch resouces in the cache via ref-cnts.

R=robertphillips@google.com
Review URL: https://codereview.appspot.com/7092061

git-svn-id: http://skia.googlecode.com/svn/trunk@7222 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/texdata.cpp b/gm/texdata.cpp
index e36feef..1f88826 100644
--- a/gm/texdata.cpp
+++ b/gm/texdata.cpp
@@ -113,8 +113,7 @@
                 SkMatrix tm;
                 tm = vm;
                 tm.postIDiv(2*S, 2*S);
-                paint.colorStage(0)->setEffect(SkNEW_ARGS(GrSingleTextureEffect,
-                                                          (texture, tm)))->unref();
+                paint.colorStage(0)->setEffect(GrSingleTextureEffect::Create(texture, tm))->unref();
 
                 ctx->drawRect(paint, GrRect::MakeWH(2*S, 2*S));