[webcrypto] Add raw symmetric key AES-KW wrap/unwrap for NSS.

content/renderer/webcrypto/webcrypto_util.cc

Index: content/renderer/webcrypto/webcrypto_util.cc
diff --git a/content/renderer/webcrypto/webcrypto_util.cc b/content/renderer/webcrypto/webcrypto_util.cc
index 5d17c932f717dddb20ff637dfbd3501f054676bf..84bfbda28b8dcbb0eb3c33713091264c87768cdb 100644
--- a/content/renderer/webcrypto/webcrypto_util.cc
+++ b/content/renderer/webcrypto/webcrypto_util.cc
@@ -114,6 +114,10 @@ Status Status::ErrorDataTooLarge() {
   return Status("The provided data is too large");
 }
 
+Status Status::ErrorDataTooSmall() {
+  return Status("The provided data is too small");
+}
+
 Status Status::ErrorUnsupported() {
   return Status("The requested operation is unsupported");
 }
@@ -128,6 +132,12 @@ Status Status::ErrorInvalidAesGcmTagLength() {
       "bits");
 }
 
+Status Status::ErrorInvalidAesKwDataLength() {
+  return Status(
+      "The AES-KW input data length is invalid: not a multiple of 8 "
+      "bytes");
+}
+
 Status Status::ErrorGenerateKeyPublicExponent() {
   return Status("The \"publicExponent\" is either empty, zero, or too large");
 }
@@ -138,6 +148,12 @@ Status Status::ErrorMissingAlgorithmImportRawKey() {
       "raw-formatted key.");
 }
 
+Status Status::ErrorMissingAlgorithmUnwrapRawKey() {
+  return Status(
+      "The key's algorithm must be specified when unwrapping a "
+      "raw-formatted key.");
+}
+
 Status Status::ErrorImportRsaEmptyModulus() {
   return Status("The modulus is empty");
 }