net: a weak DH key is not a certificate error.

net/base/net_errors.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_BASE_NET_ERRORS_H__
 #define NET_BASE_NET_ERRORS_H__
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 18 matching lines @@
   ERR_CERT_BEGIN = ERR_CERT_COMMON_NAME_INVALID,
 };
 
 // Returns a textual representation of the error code for logging purposes.
 NET_EXPORT const char* ErrorToString(int error);
 
 // Returns true if |error| is a certificate error code.
 inline bool IsCertificateError(int error) {
   // Certificate errors are negative integers from net::ERR_CERT_BEGIN
   // (inclusive) to net::ERR_CERT_END (exclusive) in *decreasing* order.
+  // ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN is currently an exception to this
+  // rule.
   return (error <= ERR_CERT_BEGIN && error > ERR_CERT_END) ||
-         (error == ERR_SSL_WEAK_SERVER_EPHEMERAL_DH_KEY) ||
          (error == ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN);
 }
 
 // Map system error code to Error.
 NET_EXPORT Error MapSystemError(int os_error);
 
 // Returns a list of all the possible net error codes (not counting OK). This
 // is intended for use with UMA histograms that are reporting the result of
 // an action that is represented as a net error code.
 //
 // Note that the error codes are all positive (since histograms expect positive
 // sample values). Also note that a guard bucket is created after any valid
 // error code that is not followed immediately by a valid error code.
 NET_EXPORT std::vector<int> GetAllErrorCodesForUma();
 
 // A convenient function to translate file error to net error code.
 NET_EXPORT Error FileErrorToNetError(base::File::Error file_error);
 
 }  // namespace net
 
 #endif  // NET_BASE_NET_ERRORS_H__