Revert of SkFontData to use smart pointers.

tools/viewer/SKPSlide.cpp

Index: tools/viewer/SKPSlide.cpp
diff --git a/tools/viewer/SKPSlide.cpp b/tools/viewer/SKPSlide.cpp
index e24e1fdb048d35718b6cd32f3e497fd9dbf9e267..9419253f0c25a2aa4f0a238018e0790bb84c09c3 100644
--- a/tools/viewer/SKPSlide.cpp
+++ b/tools/viewer/SKPSlide.cpp
@@ -35,8 +35,8 @@
 }
 
 static sk_sp<SkPicture> read_picture(const char path[]) {
-    std::unique_ptr<SkStream> stream = SkStream::MakeFromFile(path);
-    if (!stream) {
+    SkAutoTDelete<SkStream> stream(SkStream::NewFromFile(path));
+    if (stream.get() == nullptr) {
         SkDebugf("Could not read %s.\n", path);
         return nullptr;
     }