Remove --host-resolver-retry-attempts.

chrome/browser/io_thread.cc

 // 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.
 
 #include "chrome/browser/io_thread.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/base64.h"
@@ skipping 203 matching lines @@
  private:
   DISALLOW_COPY_AND_ASSIGN(SystemURLRequestContext);
 };
 
 std::unique_ptr<net::HostResolver> CreateGlobalHostResolver(
     net::NetLog* net_log) {
   TRACE_EVENT0("startup", "IOThread::CreateGlobalHostResolver");
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
 
   net::HostResolver::Options options;

[mmenke, 2017/05/30 21:46:46]

I'm leaving max_retry_attempts in options, though it's just used by tools and
tests.

-
-  // Use the retry attempts override from the command-line, if any.
-  if (command_line.HasSwitch(switches::kHostResolverRetryAttempts)) {
-    std::string s =
-        command_line.GetSwitchValueASCII(switches::kHostResolverRetryAttempts);
-    // Parse the switch (it should be a non-negative integer).
-    int n;
-    if (base::StringToInt(s, &n) && n >= 0) {
-      options.max_retry_attempts = static_cast<size_t>(n);
-    } else {
-      LOG(ERROR) << "Invalid switch for host resolver retry attempts: " << s;
-    }
-  }
-
   std::unique_ptr<net::HostResolver> global_host_resolver;
 #if defined OS_CHROMEOS
   global_host_resolver =
       chromeos::HostResolverImplChromeOS::CreateSystemResolver(options,
                                                                net_log);
 #else
   global_host_resolver =
       net::HostResolver::CreateSystemResolver(options, net_log);
 #endif
 
@@ skipping 782 matching lines @@
         GetSwitchValueAsInt(command_line, switches::kTestingFixedHttpsPort);
   }
 
   params->http_09_on_non_default_ports_enabled =
       http_09_on_non_default_ports_enabled;
 }
 
 metrics::UpdateUsagePrefCallbackType IOThread::GetMetricsDataUseForwarder() {
   return base::Bind(&UpdateMetricsUsagePrefsOnUIThread);
 }