win: Log the error code if CreateFile() fails during registration

util/win/registration_protocol_win.cc

Index: util/win/registration_protocol_win.cc
diff --git a/util/win/registration_protocol_win.cc b/util/win/registration_protocol_win.cc
index 3e0fdf213985a4bc81ae295bd3377140463045da..0f1062c786be0b7e4618132e5bd1b6ef1fa90f89 100644
--- a/util/win/registration_protocol_win.cc
+++ b/util/win/registration_protocol_win.cc
@@ -59,13 +59,14 @@ bool SendToCrashHandlerServer(const base::string16& pipe_name,
       return false;
     }
     if (bytes_read != sizeof(*response)) {
-      LOG(ERROR) << "TransactNamedPipe read incorrect number of bytes";
+      LOG(ERROR) << "TransactNamedPipe: expected " << sizeof(*response)
+                 << ", observed " << bytes_read;
       return false;
     }
     return true;
   }
 
-  LOG(ERROR) << "failed to connect after retrying";
+  PLOG(ERROR) << "CreateFile";
   return false;
 }