NSS Channel ID: don't check ECC support on every socket creation.

crypto/ec_private_key_nss.cc

Index: crypto/ec_private_key_nss.cc
diff --git a/crypto/ec_private_key_nss.cc b/crypto/ec_private_key_nss.cc
index c6c476325bb7b52ed7ee4ff0013e6346e2244559..32e4617788517f060f0dfe01cbc2b70f6d355815 100644
--- a/crypto/ec_private_key_nss.cc
+++ b/crypto/ec_private_key_nss.cc
@@ -114,7 +114,7 @@ bool ECPrivateKey::ImportFromEncryptedPrivateKeyInfo(
     bool sensitive,
     SECKEYPrivateKey** key,
     SECKEYPublicKey** public_key) {
-  ScopedPK11Slot slot(GetPublicNSSKeySlot());
+  ScopedPK11Slot slot(GetKeySlot());
   if (!slot.get())
     return false;
 
@@ -174,6 +174,11 @@ bool ECPrivateKey::ImportFromEncryptedPrivateKeyInfo(
   return true;
 }
 
+// static
+PK11SlotInfo* ECPrivateKey::GetKeySlot() {
+  return GetPublicNSSKeySlot();
+}
+
 bool ECPrivateKey::ExportEncryptedPrivateKey(
     const std::string& password,
     int iterations,
@@ -247,7 +252,7 @@ ECPrivateKey* ECPrivateKey::CreateWithParams(bool permanent,
 
   scoped_ptr<ECPrivateKey> result(new ECPrivateKey);
 
-  ScopedPK11Slot slot(GetPrivateNSSKeySlot());
+  ScopedPK11Slot slot(GetKeySlot());
   if (!slot.get())
     return NULL;