Let them eat GrEffectRef.

Changes the remaining existing code that operates on naked GrEffects to GrEffectRef.
Review URL: https://codereview.appspot.com/7124058

git-svn-id: http://skia.googlecode.com/svn/trunk@7321 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index 9739199..077d246 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -200,10 +200,10 @@
     GrDrawTarget::AutoStateRestore asr(target, GrDrawTarget::kReset_ASRInit);
     GrDrawState* drawState = target->drawState();
     drawState->setRenderTarget(rt);
-    SkAutoTUnref<GrEffectRef> conv(GrConvolutionEffect::Create(texture,
-                                                               direction,
-                                                               radius,
-                                                               sigma));
+    SkAutoTUnref<GrEffectRef> conv(GrConvolutionEffect::CreateGuassian(texture,
+                                                                       direction,
+                                                                       radius,
+                                                                       sigma));
     drawState->stage(0)->setEffect(conv);
     target->drawSimpleRect(rect, NULL);
 }