Change mojo enums to be scoped enums in the generated C++ bindings.

tools/battor_agent/battor_connection.cc

Index: tools/battor_agent/battor_connection.cc
diff --git a/tools/battor_agent/battor_connection.cc b/tools/battor_agent/battor_connection.cc
index bb99599313651a0f0c3aa20e7d26e70953bd31c7..1edf79901ea74a51ac0cfa5c09d290d029a173e5 100644
--- a/tools/battor_agent/battor_connection.cc
+++ b/tools/battor_agent/battor_connection.cc
@@ -19,10 +19,10 @@ namespace {
 // Serial configuration parameters for the BattOr.
 const uint32_t kBattOrBitrate = 2000000;
 const device::serial::DataBits kBattOrDataBits =
-    device::serial::DATA_BITS_EIGHT;
+    device::serial::DataBits::EIGHT;
 const device::serial::ParityBit kBattOrParityBit =
-    device::serial::PARITY_BIT_NONE;
-const device::serial::StopBits kBattOrStopBit = device::serial::STOP_BITS_ONE;
+    device::serial::ParityBit::NONE;
+const device::serial::StopBits kBattOrStopBit = device::serial::StopBits::ONE;
 const bool kBattOrCtsFlowControl = true;
 const bool kBattOrHasCtsFlowControl = true;
 const uint32_t kMaxMessageSize = 50000;
@@ -228,7 +228,7 @@ void BattOrConnection::ReadMoreBytes(size_t bytes_to_read) {
 void BattOrConnection::OnBytesRead(int bytes_read,
                                    device::serial::ReceiveError error) {
   if ((static_cast<size_t>(bytes_read) < pending_read_length_) ||
-      (error != device::serial::RECEIVE_ERROR_NONE)) {
+      (error != device::serial::ReceiveError::NONE)) {
     listener_->OnBytesRead(false, BATTOR_MESSAGE_TYPE_CONTROL, nullptr);
     return;
   }
@@ -275,7 +275,7 @@ void BattOrConnection::OnBytesRead(int bytes_read,
 
 void BattOrConnection::OnBytesSent(int bytes_sent,
                                    device::serial::SendError error) {
-  bool success = (error == device::serial::SEND_ERROR_NONE) &&
+  bool success = (error == device::serial::SendError::NONE) &&
                  (pending_write_length_ == static_cast<size_t>(bytes_sent));
   listener_->OnBytesSent(success);
 }