[battor_agent] Clear pending read buffer if it contains an irrevocable error.

tools/battor_agent/battor_connection_impl.cc

Index: tools/battor_agent/battor_connection_impl.cc
diff --git a/tools/battor_agent/battor_connection_impl.cc b/tools/battor_agent/battor_connection_impl.cc
index cf33c2ab97b18e1359f077f192117aae2840b6b5..d04f8c76fa2cfe00b9db34733e4586443f689236 100644
--- a/tools/battor_agent/battor_connection_impl.cc
+++ b/tools/battor_agent/battor_connection_impl.cc
@@ -258,8 +258,10 @@ void BattOrConnectionImpl::OnBytesRead(int bytes_read,
 
   if (parse_message_error != ParseMessageError::NONE) {
     LogSerial(StringPrintf(
-        "Read failed due to the message containing an irrecoverable error: %d.",
+        "Read failed due to the message containing an irrecoverable error: %d, "
+        "clearing the pending read buffer.",
         parse_message_error));
+    already_read_buffer_.clear();
     EndReadBytes(false, BATTOR_MESSAGE_TYPE_CONTROL, nullptr);
     return;
   }