Add a mechanism to disable IPv6.

(1) Adds the ability to specify the address family on a per-request basis.

(2) Exposes a --disable-ipv6 flag to chrome that changes the default address family from AF_UNSPEC to AF_INET (same sort of thing Firefox does).

(3) Changes the backing datastructure for HostCache:EntryMap and HostResolverImpl::JobMap from a "hash_map" to a "std::map". This was for consistency with other code (when I went to add a custom hash trait, I couldn't find any existing code which was using hashmap for custom keys).

(4) Updates about:net-internals to display an address family for the hostcache dump (since it is now a part of the key).

This change is in anticipation of turning off IPv6 host resolving in the PAC utility functions (see bug 24641). But it is also a feature addition.

BUG=24641

TEST=HostCacheTest.AddressFamilyIsPartOfKey
Review URL: http://codereview.chromium.org/302010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@29686 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 3 insertions, 1 deletions

diff --git a/net/base/address_list_unittest.cc b/net/base/address_list_unittest.cc
index d8ab3c1..d440c15 100644
--- a/net/base/address_list_unittest.cc
+++ b/net/base/address_list_unittest.cc
@@ -19,7 +19,9 @@ void CreateAddressList(net::AddressList* addrlist, int port) {
 #if defined(OS_WIN)
   net::EnsureWinsockInit();
 #endif
-  int rv = SystemHostResolverProc("192.168.1.1", addrlist);
+  int rv = SystemHostResolverProc("192.168.1.1",
+                                  net::ADDRESS_FAMILY_UNSPECIFIED,
+                                  addrlist);
   EXPECT_EQ(0, rv);
   addrlist->SetPort(port);
 }