Check that usage isn't empty when generateKey() is called

content/child/webcrypto/test/aes_cbc_unittest.cc

Index: content/child/webcrypto/test/aes_cbc_unittest.cc
diff --git a/content/child/webcrypto/test/aes_cbc_unittest.cc b/content/child/webcrypto/test/aes_cbc_unittest.cc
index 6814c3580038b58930ab02babcca751e08223660..b62a362acecc8cb13ae0bd3d24ac537e2f03fac9 100644
--- a/content/child/webcrypto/test/aes_cbc_unittest.cc
+++ b/content/child/webcrypto/test/aes_cbc_unittest.cc
@@ -173,7 +173,7 @@ TEST(WebCryptoAesCbcTest, GenerateKeyIsRandom) {
       ASSERT_EQ(Status::Success(),
                 GenerateSecretKey(
                     CreateAesCbcKeyGenAlgorithm(kKeyLength[key_length_i]), true,
-                    0, &key));
+                    blink::WebCryptoKeyUsageEncrypt, &key));
       EXPECT_TRUE(key.handle());
       EXPECT_EQ(blink::WebCryptoKeyTypeSecret, key.type());
       ASSERT_EQ(Status::Success(),
@@ -463,6 +463,14 @@ TEST(WebCryptoAesCbcTest, GenerateKeyBadUsages) {
   }
 }
 
+// Generate an AES-CBC key with no usages.
+TEST(WebCryptoAesCbcTest, GenerateKeyEmptyUsages) {
+  blink::WebCryptoKey key;
+
+  ASSERT_EQ(Status::ErrorCreateKeyEmptyUsages(),
+            GenerateSecretKey(CreateAesCbcKeyGenAlgorithm(128), true, 0, &key));
+}
+
 // Generate an AES-CBC key and an RSA key pair. Use the AES-CBC key to wrap the
 // key pair (using SPKI format for public key, PKCS8 format for private key).
 // Then unwrap the wrapped key pair and verify that the key data is the same.
@@ -489,7 +497,8 @@ TEST(WebCryptoAesCbcTest, WrapUnwrapRoundtripSpkiPkcs8) {
                                 blink::WebCryptoAlgorithmIdRsaSsaPkcs1v1_5,
                                 blink::WebCryptoAlgorithmIdSha256,
                                 modulus_length, public_exponent),
-                            true, 0, &public_key, &private_key));
+                            true, blink::WebCryptoKeyUsageSign, &public_key,
+                            &private_key));
 
   // Export key pair as SPKI + PKCS8
   std::vector<uint8_t> public_key_spki;
@@ -532,8 +541,8 @@ TEST(WebCryptoAesCbcTest, WrapUnwrapRoundtripSpkiPkcs8) {
   ASSERT_EQ(
       Status::Success(),
       UnwrapKey(blink::WebCryptoKeyFormatPkcs8, CryptoData(wrapped_private_key),
-                wrapping_key, wrap_algorithm, rsa_import_algorithm, true, 0,
-                &unwrapped_private_key));
+                wrapping_key, wrap_algorithm, rsa_import_algorithm, true,
+                blink::WebCryptoKeyUsageSign, &unwrapped_private_key));
 
   // Export unwrapped key pair as SPKI + PKCS8
   std::vector<uint8_t> unwrapped_public_key_spki;