Deleted redundant SymmetricKey::GetRawKey().

chrome/browser/chromeos/login/easy_unlock/easy_unlock_create_keys_operation.cc

Index: chrome/browser/chromeos/login/easy_unlock/easy_unlock_create_keys_operation.cc
diff --git a/chrome/browser/chromeos/login/easy_unlock/easy_unlock_create_keys_operation.cc b/chrome/browser/chromeos/login/easy_unlock/easy_unlock_create_keys_operation.cc
index 2a2aee9a9b948698a19cba0d778cd210d8657853..abbe1be72f5996df91558257267d090f66bd73ef 100644
--- a/chrome/browser/chromeos/login/easy_unlock/easy_unlock_create_keys_operation.cc
+++ b/chrome/browser/chromeos/login/easy_unlock/easy_unlock_create_keys_operation.cc
@@ -291,17 +291,10 @@ void EasyUnlockCreateKeysOperation::CreateKeyForDeviceAtIndex(size_t index) {
     return;
   }
 
-  std::string raw_session_key;
-  session_key->GetRawKey(&raw_session_key);
-
   challenge_creator_.reset(new ChallengeCreator(
-      user_key,
-      raw_session_key,
-      tpm_public_key_,
-      device,
+      user_key, session_key->key(), tpm_public_key_, device,
       base::Bind(&EasyUnlockCreateKeysOperation::OnChallengeCreated,
-                 weak_ptr_factory_.GetWeakPtr(),
-                 index)));
+                 weak_ptr_factory_.GetWeakPtr(), index)));
   challenge_creator_->Start();
 }