Add missing <memory> include

Change-Id: I518dd97f0a7cf521f2484f9ef3afbc6a7f24c112
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/307138
Auto-Submit: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
diff --git a/src/sksl/SkSLOutputStream.cpp b/src/sksl/SkSLOutputStream.cpp
index abcfdfa..de5f27d 100644
--- a/src/sksl/SkSLOutputStream.cpp
+++ b/src/sksl/SkSLOutputStream.cpp
@@ -7,6 +7,8 @@
 
 #include "src/sksl/SkSLOutputStream.h"
 
+#include <memory>
+
 namespace SkSL {
 
 void OutputStream::writeString(String s) {