Use ::std for is_empty, is_class, add_xxx_reference, remove decay.

include/private/SkUniquePtr.h

Index: include/private/SkUniquePtr.h
diff --git a/include/private/SkUniquePtr.h b/include/private/SkUniquePtr.h
index c68184768e31e90f6a4d75e5ca9bb5ebfaebd69c..d87ce294800ca40622c04a152ae4821563c1bf2c 100644
--- a/include/private/SkUniquePtr.h
+++ b/include/private/SkUniquePtr.h
@@ -48,7 +48,7 @@ public:
     using deleter_type = D;
 
 private:
-    template <typename B, bool = is_empty<B>::value /*&& !is_final<B>::value*/>
+    template <typename B, bool = std::is_empty<B>::value /*&& !is_final<B>::value*/>
     struct compressed_base : private B {
         /*constexpr*/ compressed_base() : B() {}
         /*constexpr*/ compressed_base(const B& b) : B(b) {}
@@ -221,7 +221,7 @@ public:
     using deleter_type = D;
 
 private:
-    template <typename B, bool = is_empty<B>::value /*&& !is_final<B>::value*/>
+    template <typename B, bool = std::is_empty<B>::value /*&& !is_final<B>::value*/>
     struct compressed_base : private B {
         /*constexpr*/ compressed_base() : B() {}
         /*constexpr*/ compressed_base(const B& b) : B(b) {}