Move base32 into base so that it can be used within base.

base/base32.h

Index: base/base32.h
diff --git a/components/base32/base32.h b/base/base32.h
similarity index 80%
rename from components/base32/base32.h
rename to base/base32.h
index 58bc58135344e1b89abab9a922e21ca592e89c36..d09831fa38631ec25b558f4c2c1d9e451b43f262 100644
--- a/components/base32/base32.h
+++ b/base/base32.h
@@ -2,14 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef COMPONENTS_BASE32_BASE32_H_
-#define COMPONENTS_BASE32_BASE32_H_
+#ifndef BASE_BASE32_H_
+#define BASE_BASE32_H_
 
 #include <string>
 
+#include "base/base_export.h"
 #include "base/strings/string_piece.h"
 
-namespace base32 {
+namespace base {
 
 enum class Base32EncodePolicy {
   // Include the trailing padding in the output, when necessary.
@@ -25,10 +26,10 @@ enum class Base32EncodePolicy {
 //
 // The |policy| defines whether padding should be included or omitted from the
 // encoded output.
-std::string Base32Encode(
-    base::StringPiece input,
+BASE_EXPORT std::string Base32Encode(
+    StringPiece input,
     Base32EncodePolicy policy = Base32EncodePolicy::INCLUDE_PADDING);
 
-}  // namespace base32
+}  // namespace base
 
-#endif  // COMPONENTS_BASE32_BASE32_H_
+#endif  // BASE_BASE32_H_