Convert callers of base::DeepCopy() to base::CreateDeepCopy() in //base

base/json/json_parser.h

Index: base/json/json_parser.h
diff --git a/base/json/json_parser.h b/base/json/json_parser.h
index 304edd1ac844911456c07277fdf396af0b93b5e8..5bdec588e040899f9228255d70d7d9a9c7bf3648 100644
--- a/base/json/json_parser.h
+++ b/base/json/json_parser.h
@@ -8,6 +8,7 @@
 #include <stddef.h>
 #include <stdint.h>
 
+#include <memory>
 #include <string>
 
 #include "base/base_export.h"
@@ -50,7 +51,7 @@ class BASE_EXPORT JSONParser {
 
   // Parses the input string according to the set options and returns the
   // result as a Value owned by the caller.
-  Value* Parse(const StringPiece& input);
+  std::unique_ptr<Value> Parse(StringPiece input);
 
   // Returns the error code.
   JSONReader::JsonParseError error_code() const;