Revert 211950 "Display DNS probe results."

chrome/common/net/net_error_info.h

 // Copyright (c) 2013 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 CHROME_COMMON_NET_NET_ERROR_INFO_H_
 #define CHROME_COMMON_NET_NET_ERROR_INFO_H_
 
 namespace chrome_common_net {
 
-// The status of a DNS probe that the NetErrorTabHelper may or may not have
-// started.
-//
-// The DNS_PROBE_FINISHED_* values are used in histograms, so:
-// 1. FINISHED_UNKNOWN must remain the first FINISHED_* value.
-// 2. FINISHED_* values must not be rearranged relative to FINISHED_UNKNOWN.
-// 3. New FINISHED_* values must be inserted at the end.
-// 4. New non-FINISHED_* values must be inserted before FINISHED_UNKNOWN.
-enum DnsProbeStatus {
-  // A DNS probe may be run for this error page.  (This status is only used on
-  // the renderer side before it's received a status update from the browser.)
-  DNS_PROBE_POSSIBLE,
-
-  // A DNS probe will not be run for this error page.  (This happens if the
-  // user has the "Use web service to resolve navigation errors" preference
-  // turned off, or if probes are disabled by the field trial.)
-  DNS_PROBE_NOT_RUN,
-
-  // A DNS probe has been started for this error page.  The renderer should
-  // expect to receive another IPC with one of the FINISHED statuses once the
-  // probe has finished (as long as the error page is still loaded).
-  DNS_PROBE_STARTED,
-
-  // A DNS probe has finished with one of the following results:
-
-  // The probe was inconclusive.
-  DNS_PROBE_FINISHED_INCONCLUSIVE,
-
-  // There's no internet connection.
-  DNS_PROBE_FINISHED_NO_INTERNET,
-
-  // The DNS configuration is wrong, or the servers are down or broken.
-  DNS_PROBE_FINISHED_BAD_CONFIG,
-
-  // The DNS servers are working fine, so the domain must not exist.
-  DNS_PROBE_FINISHED_NXDOMAIN,
-
+enum DnsProbeResult {
+  DNS_PROBE_UNKNOWN,
+  DNS_PROBE_NO_INTERNET,
+  DNS_PROBE_BAD_CONFIG,
+  DNS_PROBE_NXDOMAIN,
   DNS_PROBE_MAX
 };
 
-// Returns a string representing |status|.  It should be simply the name of
-// the value as a string, but don't rely on that.  This is presented to the
-// user as part of the DNS error page (as the error code, at the bottom),
-// and is also used in some verbose log messages.
-//
-// |status| is an int because error codes are ints by the time they get to the
-// localized error system, and we don't want to require the caller to cast back
-// to a probe status.  The function will NOTREACHED() and return an empty
-// string if given an int that does not match a value in DnsProbeStatus (or if
-// it is DNS_PROBE_MAX, which is not a real status).
-const char* DnsProbeStatusToString(int status);
-
-// Returns true if |status| is one of the DNS_PROBE_FINISHED_* statuses.
-bool DnsProbeStatusIsFinished(DnsProbeStatus status);
-
-// Returns true if DNS probes are enabled (by the DnsProbe-Enable field trial),
-// or false if they are disabled or the field trial wasn't found.
-bool DnsProbesEnabledByFieldTrial();
-
-// The error domain used to pass DNS probe statuses to the localized error
-// code.
-extern const char kDnsProbeErrorDomain[];
-
 }  // namespace chrome_common_net
 
 #endif  // CHROME_COMMON_NET_NET_ERROR_INFO_H_