Factor out common error-code conversion code for PlatformFileErrorToNetError.

net/base/net_errors.h

Index: net/base/net_errors.h
diff --git a/net/base/net_errors.h b/net/base/net_errors.h
index 12344e77609e2760ecff6ed754fdb7fc8dababb3..352d6805d5e324af042ab6b5fa3947c5ba3ccfc9 100644
--- a/net/base/net_errors.h
+++ b/net/base/net_errors.h
@@ -8,6 +8,7 @@
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/platform_file.h"
 #include "net/base/net_export.h"
 
 namespace net {
@@ -50,6 +51,9 @@ NET_EXPORT Error MapSystemError(int os_error);
 // error code that is not followed immediately by a valid error code.
 std::vector<int> GetAllErrorCodesForUma();
 
+// A convenient function to translate platform file error to net error code.
+int PlatformFileErrorToNetError(base::PlatformFileError file_error);

[willchan no longer on Chromium, 2012/07/20 16:12:59]

How about returning a net::Error instead? I think we primarily use int because
we may return a positive # of bytes when reading from a socket or something.
Since this is already a base:: enum, converting to net::Error makes sense to me.

[nhiroki (google), 2012/07/24 13:07:57]

Done.

+
 }  // namespace net
 
 #endif  // NET_BASE_NET_ERRORS_H__