use unique_ptr for stream api

Bug: skia:6888
Change-Id: I3459b4913982a7cae1c0061697c82cc65ad9a2d8
Reviewed-on: https://skia-review.googlesource.com/26740
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Mike Reed <reed@google.com>

1 files changed, 18 insertions, 2 deletions

diff --git a/src/utils/win/SkDWriteFontFileStream.h b/src/utils/win/SkDWriteFontFileStream.h
index 25322c5657..9b65752382 100644
--- a/src/utils/win/SkDWriteFontFileStream.h
+++ b/src/utils/win/SkDWriteFontFileStream.h
@@ -28,15 +28,31 @@ public:
     size_t read(void* buffer, size_t size) override;
     bool isAtEnd() const override;
     bool rewind() override;
-    SkDWriteFontFileStream* duplicate() const override;
     size_t getPosition() const override;
     bool seek(size_t position) override;
     bool move(long offset) override;
-    SkDWriteFontFileStream* fork() const override;
     size_t getLength() const override;
     const void* getMemoryBase() override;
 
+#ifdef SK_SUPPORT_LEGACY_STREAM_API
+    SkDWriteFontFileStream* duplicate() const override;
+    SkDWriteFontFileStream* fork() const override;
+#else
+    std::unique_ptr<SkDWriteFontFileStream> duplicate() const {
+        return std::unique_ptr<SkDWriteFontFileStream>(this->onDuplicate());
+    }
+    std::unique_ptr<SkDWriteFontFileStream> fork() const {
+        return std::unique_ptr<SkDWriteFontFileStream>(this->onFork());
+    }
+#endif
+
+
 private:
+#ifndef SK_SUPPORT_LEGACY_STREAM_API
+    SkDWriteFontFileStream* onDuplicate() const override;
+    SkDWriteFontFileStream* onFork() const override;
+#endif
+
     SkTScopedComPtr<IDWriteFontFileStream> fFontFileStream;
     size_t fPos;
     const void* fLockedMemory;