Transfer WebCrypto databuffers across the Blink API using blink::WebVector.

components/webcrypto/algorithms/aes_gcm_unittest.cc

Index: components/webcrypto/algorithms/aes_gcm_unittest.cc
diff --git a/components/webcrypto/algorithms/aes_gcm_unittest.cc b/components/webcrypto/algorithms/aes_gcm_unittest.cc
index 8b03a5352f7f08e9a65884f312526d3d25e1835b..d0a851b0566feccafb0240af098bf24936dad651 100644
--- a/components/webcrypto/algorithms/aes_gcm_unittest.cc
+++ b/components/webcrypto/algorithms/aes_gcm_unittest.cc
@@ -26,11 +26,8 @@ blink::WebCryptoAlgorithm CreateAesGcmAlgorithm(
     unsigned int tag_length_bits) {
   return blink::WebCryptoAlgorithm::adoptParamsAndCreate(
       blink::WebCryptoAlgorithmIdAesGcm,
-      new blink::WebCryptoAesGcmParams(
-          iv.data(), static_cast<unsigned int>(iv.size()), true,
-          additional_data.data(),
-          static_cast<unsigned int>(additional_data.size()), true,
-          tag_length_bits));
+      new blink::WebCryptoAesGcmParams(iv, true, additional_data, true,
+                                       tag_length_bits));
 }
 
 blink::WebCryptoAlgorithm CreateAesGcmKeyGenAlgorithm(