[WebCrypto] Throw syntaxError if keyUsage is empty in ImportKey

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 05f0f4eac23c0a975adb6149e696ec9a8a280a8e..1c4fcfa666bed6ae64f0186a3d490619c4420caa 100644
--- a/content/child/webcrypto/status.h
+++ b/content/child/webcrypto/status.h
@@ -228,6 +228,9 @@ class CONTENT_EXPORT Status {
   // No usages were specified when creating a secret or private key.
   static Status ErrorCreateKeyEmptyUsages();
 
+  // No usages were specified when creating/importing a secret or private key.
+  static Status ErrorKeyEmptyUsages();
+
   // An EC key imported using SPKI/PKCS8 format had the wrong curve specified in
   // the key.
   static Status ErrorImportedEcKeyIncorrectCurve();