[WebCrypto] Throw syntaxError if keyUsage is empty in ImportKey

content/child/webcrypto/nss/aes_key_nss.cc

Index: content/child/webcrypto/nss/aes_key_nss.cc
diff --git a/content/child/webcrypto/nss/aes_key_nss.cc b/content/child/webcrypto/nss/aes_key_nss.cc
index d6a7fd9cb514026bfdd5ae6fbc95daee87ca3ac4..8b13af7e30cab12a7999d427644ee3eaaf695801 100644
--- a/content/child/webcrypto/nss/aes_key_nss.cc
+++ b/content/child/webcrypto/nss/aes_key_nss.cc
@@ -59,10 +59,11 @@ Status AesAlgorithm::GenerateKey(const blink::WebCryptoAlgorithm& algorithm,
 Status AesAlgorithm::VerifyKeyUsagesBeforeImportKey(
     blink::WebCryptoKeyFormat format,
     blink::WebCryptoKeyUsageMask usages) const {
+  bool checkEmptyUsage = true;

[eroman, 2014/12/09 17:42:55]

Incorrect naming style, please read the chromium style guide.
Also no need for a variable, just pass the boolean directly to the function.

   switch (format) {
     case blink::WebCryptoKeyFormatRaw:
     case blink::WebCryptoKeyFormatJwk:
-      return CheckKeyCreationUsages(all_key_usages_, usages);
+      return CheckKeyCreationUsages(all_key_usages_, usages, checkEmptyUsage);
     default:
       return Status::ErrorUnsupportedImportKeyFormat();
   }