Roll forward to cl/338482889

Signed-off-by: Alexey Polyudov <apolyudov@google.com>
Change-Id: I9850950db8bd84f0904ea1a413151887f52098cf

cpp/platform/base/base64_utils.h

@@ -0,0 +1,19 @@
+#ifndef PLATFORM_BASE_BASE64_UTILS_H_
+#define PLATFORM_BASE_BASE64_UTILS_H_
+
+#include "platform/base/byte_array.h"
+#include "absl/strings/string_view.h"
+
+namespace location {
+namespace nearby {
+
+class Base64Utils {
+ public:
+  static std::string Encode(const ByteArray& bytes);
+  static ByteArray Decode(absl::string_view base64_string);
+};
+
+}  // namespace nearby
+}  // namespace location
+
+#endif  // PLATFORM_BASE_BASE64_UTILS_H_