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 c6fe95dab2617a1777f6e5e875902b0dade28e8c..b54e6339ff8cbe4f5b74892fa05aa5ea46d1e2c1 100644
--- a/content/child/webcrypto/test/aes_cbc_unittest.cc
+++ b/content/child/webcrypto/test/aes_cbc_unittest.cc
@@ -263,10 +263,8 @@ TEST(WebCryptoAesCbcTest, GenerateKeyIsRandom) {
     for (int j = 0; j < 16; ++j) {
       ASSERT_EQ(Status::Success(),
                 GenerateSecretKey(
-                    CreateAesCbcKeyGenAlgorithm(kKeyLength[key_length_i]),
-                    true,
-                    0,
-                    &key));
+                    CreateAesCbcKeyGenAlgorithm(kKeyLength[key_length_i]), true,
+                    blink::WebCryptoKeyUsageEncrypt, &key));
       EXPECT_TRUE(key.handle());
       EXPECT_EQ(blink::WebCryptoKeyTypeSecret, key.type());
       ASSERT_EQ(Status::Success(),
@@ -962,6 +960,14 @@ 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.
@@ -988,11 +994,8 @@ TEST(WebCryptoAesCbcTest, WrapUnwrapRoundtripSpkiPkcs8) {
             GenerateKeyPair(CreateRsaHashedKeyGenAlgorithm(
                                 blink::WebCryptoAlgorithmIdRsaSsaPkcs1v1_5,
                                 blink::WebCryptoAlgorithmIdSha256,
-                                modulus_length,
-                                public_exponent),
-                            true,
-                            0,
-                            &public_key,
+                                modulus_length, public_exponent),
+                            true, blink::WebCryptoKeyUsageSign, &public_key,
                             &private_key));
 
   // Export key pair as SPKI + PKCS8
@@ -1046,15 +1049,11 @@ TEST(WebCryptoAesCbcTest, WrapUnwrapRoundtripSpkiPkcs8) {
 
   blink::WebCryptoKey unwrapped_private_key;
 
-  ASSERT_EQ(Status::Success(),
-            UnwrapKey(blink::WebCryptoKeyFormatPkcs8,
-                      CryptoData(wrapped_private_key),
-                      wrapping_key,
-                      wrap_algorithm,
-                      rsa_import_algorithm,
-                      true,
-                      0,
-                      &unwrapped_private_key));
+  ASSERT_EQ(
+      Status::Success(),
+      UnwrapKey(blink::WebCryptoKeyFormatPkcs8, CryptoData(wrapped_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;