5 files changed, 7 insertions, 9 deletions
diff --git a/crypto/hmac.h b/crypto/hmac.h
index c0706d8..d31373a 100644
--- a/crypto/hmac.h
+++ b/crypto/hmac.h
@@ -9,10 +9,9 @@
 #define CRYPTO_HMAC_H_
 #pragma once
 
-#include <string>
-
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/string_piece.h"
 
 namespace crypto {
 
@@ -42,7 +41,7 @@ class HMAC {
 
   // Initializes this instance using |key|. Call Init only once. It returns
   // false on the second or later calls.
-  bool Init(const std::string& key) {
+  bool Init(const base::StringPiece& key) {
     return Init(reinterpret_cast<const unsigned char*>(key.data()),
                 static_cast<int>(key.size()));
   }
@@ -51,8 +50,7 @@ class HMAC {
   // to the constructor and the key supplied to the Init method. The HMAC is
   // returned in |digest|, which has |digest_length| bytes of storage available.
   // TODO(abarth): digest_length should be a size_t.
-  bool Sign(const std::string& data,
-            unsigned char* digest,
+  bool Sign(const base::StringPiece& data, unsigned char* digest,
             int digest_length) const;
 
   // TODO(albertb): Add a Verify method.
diff --git a/crypto/hmac_mac.cc b/crypto/hmac_mac.cc
index fefd6e7..f9a00cd 100644
--- a/crypto/hmac_mac.cc
+++ b/crypto/hmac_mac.cc
@@ -39,7 +39,7 @@ HMAC::~HMAC() {
   plat_->key_.reserve(0);
 }
 
-bool HMAC::Sign(const std::string& data,
+bool HMAC::Sign(const base::StringPiece& data,
                 unsigned char* digest,
                 int digest_length) const {
   CCHmacAlgorithm algorithm;
diff --git a/crypto/hmac_nss.cc b/crypto/hmac_nss.cc
index 722fcf1..81b2e39 100644
--- a/crypto/hmac_nss.cc
+++ b/crypto/hmac_nss.cc
@@ -73,7 +73,7 @@ bool HMAC::Init(const unsigned char *key, int key_length) {
   return true;
 }
 
-bool HMAC::Sign(const std::string& data,
+bool HMAC::Sign(const base::StringPiece& data,
                 unsigned char* digest,
                 int digest_length) const {
   if (!plat_->sym_key_.get()) {
diff --git a/crypto/hmac_openssl.cc b/crypto/hmac_openssl.cc
index 8b7b96d..74645c7 100644
--- a/crypto/hmac_openssl.cc
+++ b/crypto/hmac_openssl.cc
@@ -40,7 +40,7 @@ HMAC::~HMAC() {
   STLClearObject(&plat_->key);
 }
 
-bool HMAC::Sign(const std::string& data,
+bool HMAC::Sign(const base::StringPiece& data,
                 unsigned char* digest,
                 int digest_length) const {
   DCHECK_GE(digest_length, 0);
diff --git a/crypto/hmac_win.cc b/crypto/hmac_win.cc
index 1e6954a..34facc5 100644
--- a/crypto/hmac_win.cc
+++ b/crypto/hmac_win.cc
@@ -154,7 +154,7 @@ bool HMAC::Init(const unsigned char* key, int key_length) {
 HMAC::~HMAC() {
 }
 
-bool HMAC::Sign(const std::string& data,
+bool HMAC::Sign(const base::StringPiece& data,
                 unsigned char* digest,
                 int digest_length) const {
   if (hash_alg_ == SHA256) {