Update Token Binding code to the latest drafts

net/http/http_network_transaction.cc

Index: net/http/http_network_transaction.cc
diff --git a/net/http/http_network_transaction.cc b/net/http/http_network_transaction.cc
index 1e2ffcf64499f18c5c3cb73f3e010097cfea17e5..d01f6e484bc22c5b0572f48ff45511bee6b57830 100644
--- a/net/http/http_network_transaction.cc
+++ b/net/http/http_network_transaction.cc
@@ -1029,8 +1029,9 @@ int HttpNetworkTransaction::BuildRequestHeaders(
 int HttpNetworkTransaction::BuildTokenBindingHeader(std::string* out) {
   base::TimeTicks start = base::TimeTicks::Now();
   std::vector<uint8_t> signed_ekm;
-  int rv = stream_->GetSignedEKMForTokenBinding(
-      provided_token_binding_key_.get(), &signed_ekm);
+  int rv = stream_->GetTokenBindingSignature(provided_token_binding_key_.get(),
+                                             TokenBindingType::PROVIDED,
+                                             &signed_ekm);
   if (rv != OK)
     return rv;
   std::string provided_token_binding;
@@ -1046,8 +1047,9 @@ int HttpNetworkTransaction::BuildTokenBindingHeader(std::string* out) {
   std::string referred_token_binding;
   if (referred_token_binding_key_) {
     std::vector<uint8_t> referred_signed_ekm;
-    int rv = stream_->GetSignedEKMForTokenBinding(
-        referred_token_binding_key_.get(), &referred_signed_ekm);
+    int rv = stream_->GetTokenBindingSignature(
+        referred_token_binding_key_.get(), TokenBindingType::REFERRED,
+        &referred_signed_ekm);
     if (rv != OK)
       return rv;
     rv = BuildTokenBinding(TokenBindingType::REFERRED,
@@ -1061,8 +1063,7 @@ int HttpNetworkTransaction::BuildTokenBindingHeader(std::string* out) {
   rv = BuildTokenBindingMessageFromTokenBindings(token_bindings, &header);
   if (rv != OK)
     return rv;
-  base::Base64UrlEncode(header, base::Base64UrlEncodePolicy::INCLUDE_PADDING,
-                        out);
+  base::Base64UrlEncode(header, base::Base64UrlEncodePolicy::OMIT_PADDING, out);
   base::TimeDelta header_creation_time = base::TimeTicks::Now() - start;
   UMA_HISTOGRAM_CUSTOM_TIMES("Net.TokenBinding.HeaderCreationTime",
                              header_creation_time,