Implement PBKDF2 (except for generateKey) using BoringSSL

content/child/webcrypto/nss/util_nss.cc

Index: content/child/webcrypto/nss/util_nss.cc
diff --git a/content/child/webcrypto/nss/util_nss.cc b/content/child/webcrypto/nss/util_nss.cc
index aa1aa65580ca364a4c5a32a6e8f09f8ad9c00ce5..ad6d94e0ec76d795a3375175c4617c58fa34ac0e 100644
--- a/content/child/webcrypto/nss/util_nss.cc
+++ b/content/child/webcrypto/nss/util_nss.cc
@@ -101,6 +101,12 @@ AlgorithmImplementation* CreatePlatformEcdhImplementation() {
   return NULL;
 }
 
+AlgorithmImplementation* CreatePlatformPbkdf2Implementation() {
+  // PBKDF2 will only be implemented for BoringSSL, since the NSS
+  // implementation is being deprecated.
+  return NULL;
+}
+
 }  // namespace webcrypto
 
 }  // namespace content