[WebCrypto] Throw syntaxError if keyUsage is empty in ImportKey

content/child/webcrypto/nss/hmac_nss.cc

Index: content/child/webcrypto/nss/hmac_nss.cc
diff --git a/content/child/webcrypto/nss/hmac_nss.cc b/content/child/webcrypto/nss/hmac_nss.cc
index bb146d4977708f8572ecee0207d3643629bb3749..7df70a5906c179e505a2227766de9d374dadb1c9 100644
--- a/content/child/webcrypto/nss/hmac_nss.cc
+++ b/content/child/webcrypto/nss/hmac_nss.cc
@@ -59,7 +59,7 @@ class HmacImplementation : public AlgorithmImplementation {
                      bool extractable,
                      blink::WebCryptoKeyUsageMask usages,
                      GenerateKeyResult* result) const override {
-    Status status = CheckKeyCreationUsages(kAllKeyUsages, usages);
+    Status status = CheckKeyCreationUsages(kAllKeyUsages, usages, false);

[eroman, 2014/12/09 21:04:46]

Same here.

[Habib Virji, 2014/12/15 18:48:55]

Done.

     if (status.IsError())
       return status;
 
@@ -87,7 +87,7 @@ class HmacImplementation : public AlgorithmImplementation {
     switch (format) {
       case blink::WebCryptoKeyFormatRaw:
       case blink::WebCryptoKeyFormatJwk:
-        return CheckKeyCreationUsages(kAllKeyUsages, usages);
+        return CheckKeyCreationUsages(kAllKeyUsages, usages, true);
       default:
         return Status::ErrorUnsupportedImportKeyFormat();
     }