SkFontData to use smart pointers.

bench/nanobench.cpp

Index: bench/nanobench.cpp
diff --git a/bench/nanobench.cpp b/bench/nanobench.cpp
index 5db5137ffd6f1f288da6e607bf3919586a38aa10..433cfa89d9cdde2998fa3b4923ee1c2baf555631 100644
--- a/bench/nanobench.cpp
+++ b/bench/nanobench.cpp
@@ -645,8 +645,8 @@ public:
             return nullptr;
         }
 
-        SkAutoTDelete<SkStream> stream(SkStream::NewFromFile(path));
-        if (stream.get() == nullptr) {
+        std::unique_ptr<SkStream> stream = SkStream::MakeFromFile(path);
+        if (!stream) {
             SkDebugf("Could not read %s.\n", path);
             return nullptr;
         }