Change Cronet's "disable_ipv6" to "disable_ipv6_on_wifi"

net/dns/host_resolver.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_DNS_HOST_RESOLVER_H_
 #define NET_DNS_HOST_RESOLVER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 203 matching lines @@
       std::unique_ptr<const base::Value> old_data);
 
   // Sets the default AddressFamily to use when requests have left it
   // unspecified. For example, this could be used to restrict resolution
   // results to AF_INET by passing in ADDRESS_FAMILY_IPV4, or to
   // AF_INET6 by passing in ADDRESS_FAMILY_IPV6. See http://crbug.com/696569 for
   // why this option is necessary.
   virtual void SetDefaultAddressFamily(AddressFamily address_family);
   virtual AddressFamily GetDefaultAddressFamily() const;
 
+  // Sets the HostResolver to assume that IPv6 is unreachable when on a wifi
+  // connection. See http://crbug.com/696569 for further context.

[pauljensen, 2017/04/13 17:17:01]

nit:https

[mgersh, 2017/04/13 19:07:20]

Done.

+  virtual void SetNoIPv6OnWifi();

[pauljensen, 2017/04/13 17:17:01]

This should probably take a bool.  Calling it "enabled" may be quite confusing;
perhaps "no_ipv6_on_wifi"

[mgersh, 2017/04/13 19:07:20]

Done.

+  virtual bool GetNoIPv6OnWifi();
+
   // Creates a HostResolver implementation that queries the underlying system.
   // (Except if a unit-test has changed the global HostResolverProc using
   // ScopedHostResolverProc to intercept requests to the system).
   static std::unique_ptr<HostResolver> CreateSystemResolver(
       const Options& options,
       NetLog* net_log);
   // Same, but explicitly returns the HostResolverImpl. Only used by
   // StaleHostResolver in cronet.
   static std::unique_ptr<HostResolverImpl> CreateSystemResolverImpl(
       const Options& options,
       NetLog* net_log);
 
   // As above, but uses default parameters.
   static std::unique_ptr<HostResolver> CreateDefaultResolver(NetLog* net_log);
   // Same, but explicitly returns the HostResolverImpl. Only used by
   // StaleHostResolver in cronet.
   static std::unique_ptr<HostResolverImpl> CreateDefaultResolverImpl(
       NetLog* net_log);
 
  protected:
   HostResolver();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(HostResolver);
 };
 
 }  // namespace net
 
 #endif  // NET_DNS_HOST_RESOLVER_H_