Reject JWK key import when key_ops contains duplicate values.

content/child/webcrypto/status.h

Index: content/child/webcrypto/status.h
diff --git a/content/child/webcrypto/status.h b/content/child/webcrypto/status.h
index 7134ef35bccea5a4aa2306438ce72bec3a1a3ede..4c1aae6e1857a1d047839c2e1516d52c9d24cfbd 100644
--- a/content/child/webcrypto/status.h
+++ b/content/child/webcrypto/status.h
@@ -111,6 +111,9 @@ class CONTENT_EXPORT Status {
   // violates the JWA requirement that such octet strings be minimal.
   static Status ErrorJwkBigIntegerHasLeadingZero(const std::string& property);
 
+  // The key_ops lists a usage more than once.
+  static Status ErrorJwkDuplicateKeyOps();
+
   // ------------------------------------
   // Other errors
   // ------------------------------------