Refactor: Extract some duplicated code for verifying usages during import of asymmetric key.

content/child/webcrypto/nss/rsa_key_nss.cc

Index: content/child/webcrypto/nss/rsa_key_nss.cc
diff --git a/content/child/webcrypto/nss/rsa_key_nss.cc b/content/child/webcrypto/nss/rsa_key_nss.cc
index 7a35593c18bdd75b2bfd5d7cd6e29704aa5f069b..a92163d90c55d592debac5c3f38efb0b2d41bfac 100644
--- a/content/child/webcrypto/nss/rsa_key_nss.cc
+++ b/content/child/webcrypto/nss/rsa_key_nss.cc
@@ -588,23 +588,8 @@ Status RsaHashedAlgorithm::GenerateKey(
 Status RsaHashedAlgorithm::VerifyKeyUsagesBeforeImportKey(
     blink::WebCryptoKeyFormat format,
     blink::WebCryptoKeyUsageMask usages) const {
-  switch (format) {
-    case blink::WebCryptoKeyFormatSpki:
-      return CheckKeyCreationUsages(all_public_key_usages_, usages);
-    case blink::WebCryptoKeyFormatPkcs8:
-      return CheckKeyCreationUsages(all_private_key_usages_, usages);
-    case blink::WebCryptoKeyFormatJwk:
-      // The JWK could represent either a public key or private key. The usages
-      // must make sense for one of the two. The usages will be checked again by
-      // ImportKeyJwk() once the key type has been determined.
-      if (CheckKeyCreationUsages(all_private_key_usages_, usages).IsSuccess() ||
-          CheckKeyCreationUsages(all_public_key_usages_, usages).IsSuccess()) {
-        return Status::Success();
-      }
-      return Status::ErrorCreateKeyBadUsages();
-    default:
-      return Status::ErrorUnsupportedImportKeyFormat();
-  }
+  return VerifyUsagesBeforeImportAsymmetricKey(format, all_public_key_usages_,
+                                               all_private_key_usages_, usages);
 }
 
 Status RsaHashedAlgorithm::ImportKeyPkcs8(