Fix a bad comparator. This caused lookups in std::map to be wrong....

net/base/host_cache.h

Index: net/base/host_cache.h
===================================================================
--- net/base/host_cache.h	(revision 30053)
+++ net/base/host_cache.h	(working copy)
@@ -42,9 +42,9 @@
     }
 
     bool operator<(const Key& other) const {
-      if (address_family < other.address_family)
-        return true;
-      return hostname < other.hostname;
+      if (address_family == other.address_family)
+        return hostname < other.hostname;
+      return address_family < other.address_family;
     }
 
     std::string hostname;