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

tools/skiaserve/urlhandlers/BreakHandler.cpp

Index: tools/skiaserve/urlhandlers/BreakHandler.cpp
diff --git a/tools/skiaserve/urlhandlers/BreakHandler.cpp b/tools/skiaserve/urlhandlers/BreakHandler.cpp
index 7766adb021c5de880ed987b11f751cb05540b4b2..f4f741fe3495943c1a04b3eff46cafd9a0ecd0dc 100644
--- a/tools/skiaserve/urlhandlers/BreakHandler.cpp
+++ b/tools/skiaserve/urlhandlers/BreakHandler.cpp
@@ -80,6 +80,5 @@ int BreakHandler::handle(Request* request, MHD_Connection* connection,
     canvas->restoreToCount(saveCount);
     SkDynamicMemoryWStream stream;
     stream.writeText(Json::FastWriter().write(response).c_str());
-    sk_sp<SkData> data(stream.copyToData());
-    return SendData(connection, data.get(), "application/json");
+    return SendData(connection, stream.detachAsData().get(), "application/json");
 }