Use FindNSSKeyFromPublicKeyInfoInSlot in GetPrivateKeyOnWorkerThread.

chrome/browser/chromeos/platform_keys/platform_keys_nss.cc

Index: chrome/browser/chromeos/platform_keys/platform_keys_nss.cc
diff --git a/chrome/browser/chromeos/platform_keys/platform_keys_nss.cc b/chrome/browser/chromeos/platform_keys/platform_keys_nss.cc
index 5678bafc5fe2217f5d03438aff3b40c365ed67da..f2b51a7f1bc689c91aa6a146aa89acd16a2cbdd6 100644
--- a/chrome/browser/chromeos/platform_keys/platform_keys_nss.cc
+++ b/chrome/browser/chromeos/platform_keys/platform_keys_nss.cc
@@ -451,14 +451,16 @@ void SignRSAOnWorkerThread(scoped_ptr<SignRSAState> state) {
   std::vector<uint8> public_key_vector(
       public_key_uint8, public_key_uint8 + state->public_key_.size());
 
-  // TODO(pneubeck): This searches all slots. Change to look only at |slot_|.
-  crypto::ScopedSECKEYPrivateKey rsa_key(
-      crypto::FindNSSKeyFromPublicKeyInfo(public_key_vector));
-
-  // Fail if the key was not found. If a specific slot was requested, also fail
-  // if the key was found in the wrong slot.
-  if (!rsa_key || SECKEY_GetPrivateKeyType(rsa_key.get()) != rsaKey ||
-      (state->slot_ && rsa_key->pkcs11Slot != state->slot_)) {
+  crypto::ScopedSECKEYPrivateKey rsa_key;
+  if (state->slot_) {
+    rsa_key = crypto::FindNSSKeyFromPublicKeyInfoInSlot(public_key_vector,
+                                                        state->slot_);
+  } else {
+    rsa_key = crypto::FindNSSKeyFromPublicKeyInfo(public_key_vector);
+  }
+
+  // Fail if the key was not found or is of the wrong type.
+  if (!rsa_key || SECKEY_GetPrivateKeyType(rsa_key.get()) != rsaKey) {
     state->OnError(FROM_HERE, kErrorKeyNotFound);
     return;
   }