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, 4 insertions, 2 deletions

diff --git a/net/base/host_resolver_impl_unittest.cc b/net/base/host_resolver_impl_unittest.cc
index fd35d88..eee6fd1 100644
--- a/net/base/host_resolver_impl_unittest.cc
+++ b/net/base/host_resolver_impl_unittest.cc
@@ -46,13 +46,15 @@ class CapturingHostResolverProc : public HostResolverProc {
     event_.Signal();
   }
 
-  virtual int Resolve(const std::string& host, AddressList* addrlist) {
+  virtual int Resolve(const std::string& host,
+                      AddressFamily address_family,
+                      AddressList* addrlist) {
     event_.Wait();
     {
       AutoLock l(lock_);
       capture_list_.push_back(host);
     }
-    return ResolveUsingPrevious(host, addrlist);
+    return ResolveUsingPrevious(host, address_family, addrlist);
   }
 
   std::vector<std::string> GetCaptureList() const {