Fix component build with gcc 4.6 on Android.

crypto/openssl_bio_string.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CRYPTO_OPENSSL_BIO_STRING_H_
 #define CRYPTO_OPENSSL_BIO_STRING_H_
 
 #include <string>
 
 #include "crypto/crypto_export.h"
 
 // From <openssl/bio.h>
 typedef struct bio_st BIO;
 
 namespace crypto {
 
 // Creates a new BIO that can be used with OpenSSL's various output functions,
 // and which will write all output directly into |out|. This is primarily
 // intended as a utility to reduce the amount of copying and separate
 // allocations when performing extensive string modifications or streaming
 // within OpenSSL.
 //
 // Note: |out| must remain valid for the duration of the BIO.
-BIO* CRYPTO_EXPORT BIO_new_string(std::string* out);
+CRYPTO_EXPORT BIO* BIO_new_string(std::string* out);
 
 }  // namespace crypto
 
 #endif  // CRYPTO_OPENSSL_BIO_STRING_H_