[WebCrypto] Throw syntaxError if keyUsage is empty in ImportKey

content/child/webcrypto/openssl/hmac_openssl.cc

Index: content/child/webcrypto/openssl/hmac_openssl.cc
diff --git a/content/child/webcrypto/openssl/hmac_openssl.cc b/content/child/webcrypto/openssl/hmac_openssl.cc
index 76f63c3236818e539f11baed09808b6cbd6fb484..73f0d4d2f9b62221cba8d5462e1d898c2c3c5a94 100644
--- a/content/child/webcrypto/openssl/hmac_openssl.cc
+++ b/content/child/webcrypto/openssl/hmac_openssl.cc
@@ -105,6 +105,9 @@ class HmacImplementation : public AlgorithmImplementation {
                       bool extractable,
                       blink::WebCryptoKeyUsageMask usages,
                       blink::WebCryptoKey* key) const override {
+    if (usages == 0)
+      return ErrorImportKeyEmptyUsages();
+
     const blink::WebCryptoAlgorithm& hash =
         algorithm.hmacImportParams()->hash();
 
@@ -125,6 +128,9 @@ class HmacImplementation : public AlgorithmImplementation {
                       bool extractable,
                       blink::WebCryptoKeyUsageMask usages,
                       blink::WebCryptoKey* key) const override {
+    if (usages == 0)
+      return ErrorImportKeyEmptyUsages();
+
     const char* algorithm_name =
         GetJwkHmacAlgorithmName(algorithm.hmacImportParams()->hash().id());
     if (!algorithm_name)