Make SkStream *not* ref counted.

dm/DMImageTask.cpp

Index: dm/DMImageTask.cpp
diff --git a/dm/DMImageTask.cpp b/dm/DMImageTask.cpp
index 1657984f1ee71d6ed4956320142aa9f1bf053619..6fb7f7d613f1deecb968237a315e1883a589cad2 100644
--- a/dm/DMImageTask.cpp
+++ b/dm/DMImageTask.cpp
@@ -38,14 +38,15 @@ void ImageTask::draw() {
         return;
     }
 
-    SkMemoryStream stream(fEncoded->data(), fEncoded->size());
-    SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(&stream));
+    SkAutoTDelete<SkMemoryStream> stream(SkNEW_ARGS(SkMemoryStream,
+                                                    (fEncoded->data(), fEncoded->size())));
+    SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(stream));
     if (!decoder) {
         return this->fail("Can't find good decoder.");
     }
 
     int w,h;
-    if (!decoder->buildTileIndex(&stream, &w, &h) || w*h == 1) {
+    if (!decoder->buildTileIndex(stream.detach(), &w, &h) || w*h == 1) {
         return;  // Subset decoding is not always supported.
     }