Remvoe duplicate impl for SkImageInfo flattening

src/core/SkMaskFilter.cpp

Index: src/core/SkMaskFilter.cpp
diff --git a/src/core/SkMaskFilter.cpp b/src/core/SkMaskFilter.cpp
index f062f135fdbebbd4f5016bfde05dc0a424e04ccb..adfed4109899dfda776e8b765fa393d02f8309ae 100644
--- a/src/core/SkMaskFilter.cpp
+++ b/src/core/SkMaskFilter.cpp
@@ -349,10 +349,14 @@ bool SkMaskFilter::filterMaskGPU(GrContext* context,
     if (!result) {
         return false;
     }
+    SkAutoUnref aur(dst);
 
+    SkImageInfo info;
     resultBM->setConfig(srcBM.config(), dst->width(), dst->height());
-    resultBM->setPixelRef(SkNEW_ARGS(SkGrPixelRef, (dst)))->unref();
-    dst->unref();
+    if (resultBM->asImageInfo(&info)) {
+        return false;
+    }
+    resultBM->setPixelRef(SkNEW_ARGS(SkGrPixelRef, (info, dst)))->unref();
     return true;
 }