Allow single-pass filters (which use asNewEffect()) to participate in the image filter DAG. This w…

src/effects/SkMatrixConvolutionImageFilter.cpp

Index: src/effects/SkMatrixConvolutionImageFilter.cpp
diff --git a/src/effects/SkMatrixConvolutionImageFilter.cpp b/src/effects/SkMatrixConvolutionImageFilter.cpp
index e3711d29b911e4579eb4e2f1a56939310394efbd..b22dcb01bc0c0d52b974355d3f88485fd4754e5b 100644
--- a/src/effects/SkMatrixConvolutionImageFilter.cpp
+++ b/src/effects/SkMatrixConvolutionImageFilter.cpp
@@ -560,20 +560,20 @@ GrEffectRef* GrMatrixConvolutionEffect::TestCreate(SkMWCRandom* random,
                                              convolveAlpha);
 }
 
-bool SkMatrixConvolutionImageFilter::asNewEffect(GrEffectRef** effect,
-                                                 GrTexture* texture) const {
-    bool ok = fKernelSize.width() * fKernelSize.height() <= MAX_KERNEL_SIZE;
-    if (ok && effect) {
-        *effect = GrMatrixConvolutionEffect::Create(texture,
-                                                    fKernelSize,
-                                                    fKernel,
-                                                    fGain,
-                                                    fBias,
-                                                     fTarget,
-                                                     fTileMode,
-                                                     fConvolveAlpha);
-    }
-    return ok;
+bool SkMatrixConvolutionImageFilter::canFilterImageGPU() const {
+    return fKernelSize.width() * fKernelSize.height() <= MAX_KERNEL_SIZE;
+}
+
+GrEffectRef* SkMatrixConvolutionImageFilter::asNewEffect(GrTexture* texture) const {
+    SkASSERT(fKernelSize.width() * fKernelSize.height() <= MAX_KERNEL_SIZE);
+    return GrMatrixConvolutionEffect::Create(texture,
+                                             fKernelSize,
+                                             fKernel,
+                                             fGain,
+                                             fBias,
+                                             fTarget,
+                                             fTileMode,
+                                             fConvolveAlpha);
 }
 
 ///////////////////////////////////////////////////////////////////////////////