skstd -> std for unique_ptr

TBR=reed@google.com
No public API changes.

BUG=skia:4564

Committed: https://skia.googlesource.com/skia/+/755c553c17b82bb5de3d9cc8d3b2a866ff9e9e50

CQ_EXTRA_TRYBOTS=client.skia.compile:Build-Mac10.9-Clang-x86_64-Release-CMake-Trybot,Build-Ubuntu-GCC-x86_64-Debug-CrOS_Link-Trybot;client.skia:Perf-Mac10.9-Clang-MacMini6.2-CPU-AVX-x86_64-Release-Trybot,Test-iOS-Clang-iPad4-GPU-SGX554-Arm7-Release-Trybot

Committed: https://skia.googlesource.com/skia/+/06189155d987db5c7e69015f6ea87c2168d6a065

Committed: https://skia.googlesource.com/skia/+/70e8dfca4a7f5bce97b8021a6e378c4828b09c8c

Committed: https://skia.googlesource.com/skia/+/dadfc245cc9a0279ff7b73da3344f2ca5d139907
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1436033003

Review URL: https://codereview.chromium.org/1436033003

1 files changed, 15 insertions, 5 deletions

diff --git a/include/core/SkRefCnt.h b/include/core/SkRefCnt.h
index 9d1e5f1f02..1779278c6f 100644
--- a/include/core/SkRefCnt.h
+++ b/include/core/SkRefCnt.h
@@ -9,8 +9,8 @@
 #define SkRefCnt_DEFINED
 
 #include "../private/SkAtomics.h"
-#include "../private/SkUniquePtr.h"
 #include "SkTypes.h"
+#include <memory>
 
 /** \class SkRefCntBase
 
@@ -185,12 +185,22 @@ template <typename T> struct SkTUnref {
 /**
  *  Utility class that simply unref's its argument in the destructor.
  */
-template <typename T> class SkAutoTUnref : public skstd::unique_ptr<T, SkTUnref<T>> {
+template <typename T> class SkAutoTUnref {
 public:
-    explicit SkAutoTUnref(T* obj = nullptr) : skstd::unique_ptr<T, SkTUnref<T>>(obj) {}
+    explicit SkAutoTUnref(T* obj = nullptr) : fPtr(obj) {}
 
-    T* detach() { return this->release(); }
-    operator T*() const { return this->get(); }
+    void swap(SkAutoTUnref& other) { fPtr.swap(other.fPtr); }
+
+    T*        get() const { return fPtr.get(); }
+    operator T*  () const { return fPtr.get(); }
+    T* operator->() const { return fPtr.get(); }
+
+    void reset(T* ptr = nullptr) { fPtr.reset(ptr); }
+    T* detach()  { return fPtr.release(); }
+    T* release() { return fPtr.release(); }
+
+private:
+    std::unique_ptr<T, SkTUnref<T>> fPtr;
 };
 // Can't use the #define trick below to guard a bare SkAutoTUnref(...) because it's templated. :(