[WebCrypto] Throw syntaxError if keyUsage is empty in ImportKey

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 fa5f464641fa14461a79e228ddc3cfbc3e286d09..6d781abd359bf8865245196e02a694f4ab3012d9 100644
--- a/content/child/webcrypto/status.cc
+++ b/content/child/webcrypto/status.cc
@@ -273,6 +273,11 @@ Status Status::ErrorCreateKeyEmptyUsages() {
                 "Usages cannot be empty when creating a key.");
 }
 
+Status Status::ErrorImportKeyEmptyUsages() {
+  return Status(blink::WebCryptoErrorTypeSyntax,
+                "Usages cannot be empty when importing a key.");
+}
+
 Status Status::ErrorImportedEcKeyIncorrectCurve() {
   return Status(
       blink::WebCryptoErrorTypeData,