Deleted redundant SymmetricKey::GetRawKey().

crypto/hmac.cc

Index: crypto/hmac.cc
diff --git a/crypto/hmac.cc b/crypto/hmac.cc
index 0480099e9cbebcbe362e0737d94e874ee0691996..4db1f6e1bf01332d36da0e329e9d89978ceb1b0c 100644
--- a/crypto/hmac.cc
+++ b/crypto/hmac.cc
@@ -50,12 +50,7 @@ bool HMAC::Init(const unsigned char* key, size_t key_length) {
 }
 
 bool HMAC::Init(const SymmetricKey* key) {
-  std::string raw_key;
-  bool result = key->GetRawKey(&raw_key) && Init(raw_key);
-  // Zero out key copy.  This might get optimized away, but one can hope.
-  // Using std::string to store key info at all is a larger problem.
-  std::fill(raw_key.begin(), raw_key.end(), 0);
-  return result;
+  return Init(key->key());
 }
 
 bool HMAC::Sign(const base::StringPiece& data,