Reject JWK key import when key_ops contains duplicate values.

content/child/webcrypto/status.cc

Index: content/child/webcrypto/status.cc
diff --git a/content/child/webcrypto/status.cc b/content/child/webcrypto/status.cc
index b3f7c3c01482d4660afc2f1552297f9f0c1e4787..d1ceffc5762bcf1391eaed65206aa2bc09e7293a 100644
--- a/content/child/webcrypto/status.cc
+++ b/content/child/webcrypto/status.cc
@@ -116,6 +116,12 @@ Status Status::ErrorJwkBigIntegerHasLeadingZero(const std::string& property) {
       "The JWK \"" + property + "\" property contained a leading zero.");
 }
 
+Status Status::ErrorJwkDuplicateKeyOps() {
+  return Status(blink::WebCryptoErrorTypeData,
+                "The \"key_ops\" property of the JWK dictionary contains "
+                "duplicate usages.");
+}
+
 Status Status::ErrorImportEmptyKeyData() {
   return Status(blink::WebCryptoErrorTypeData, "No key data was provided");
 }