Inline deprecated versions of absl::Base64Escape() and
absl::WebSafeBase64Escape()

PiperOrigin-RevId: 871304867
Change-Id: Id35fbc05d7f2f483333e6975e5a16f3a04d361fe

absl/strings/escaping_benchmark.cc

diff --git a/absl/strings/escaping_benchmark.cc b/absl/strings/escaping_benchmark.cc
index 32b8f6e..64b5a41 100644
--- a/absl/strings/escaping_benchmark.cc
+++ b/absl/strings/escaping_benchmark.cc
@@ -49,9 +49,7 @@
     }
   }
   for (auto _ : state) {
-    std::string escaped;
-    benchmark::DoNotOptimize(raw);
-    absl::WebSafeBase64Escape(raw, &escaped);
+    std::string escaped = absl::WebSafeBase64Escape(raw);
     benchmark::DoNotOptimize(escaped);
   }
 }

absl/strings/escaping_test.cc

diff --git a/absl/strings/escaping_test.cc b/absl/strings/escaping_test.cc
index cb9e37f..9651953 100644
--- a/absl/strings/escaping_test.cc
+++ b/absl/strings/escaping_test.cc
@@ -683,8 +683,7 @@
   static_assert(kSize % 3 == 0, "kSize must be divisible by 3");
   const std::string huge(kSize, 'x');
 
-  std::string escaped;
-  absl::Base64Escape(huge, &escaped);
+  std::string escaped = absl::Base64Escape(huge);
 
   // Generates the string that should match a base64 encoded "xxx..." string.
   // "xxx" in base64 is "eHh4".