change SkStreams to work with sk_sp<SkData> instead of SkData*

bench/CodecBench.cpp

Index: bench/CodecBench.cpp
diff --git a/bench/CodecBench.cpp b/bench/CodecBench.cpp
index e3bf1ccb22bade5d6e134adeaa3f824994a0a028..9bd404db55e05658aaf41579abeee036489f5cf3 100644
--- a/bench/CodecBench.cpp
+++ b/bench/CodecBench.cpp
@@ -26,7 +26,7 @@ CodecBench::CodecBench(SkString baseName, SkData* encoded, SkColorType colorType
             alpha_type_to_str(alphaType));
 #ifdef SK_DEBUG
     // Ensure that we can create an SkCodec from this data.
-    SkAutoTDelete<SkCodec> codec(SkCodec::NewFromData(fData.get()));
+    SkAutoTDelete<SkCodec> codec(SkCodec::NewFromData(fData));
     SkASSERT(codec);
 #endif
 }
@@ -40,7 +40,7 @@ bool CodecBench::isSuitableFor(Backend backend) {
 }
 
 void CodecBench::onDelayedSetup() {
-    SkAutoTDelete<SkCodec> codec(SkCodec::NewFromData(fData.get()));
+    SkAutoTDelete<SkCodec> codec(SkCodec::NewFromData(fData));
 
     fInfo = codec->getInfo().makeColorType(fColorType)
                             .makeAlphaType(fAlphaType)
@@ -59,7 +59,7 @@ void CodecBench::onDraw(int n, SkCanvas* canvas) {
     }
     for (int i = 0; i < n; i++) {
         colorCount = 256;
-        codec.reset(SkCodec::NewFromData(fData.get()));
+        codec.reset(SkCodec::NewFromData(fData));
 #ifdef SK_DEBUG
         const SkCodec::Result result =
 #endif