Fixed crash involving using NetAddress::Adopt() incorrectly

net/base/address_list.h

Index: net/base/address_list.h
diff --git a/net/base/address_list.h b/net/base/address_list.h
index 1ca86a144c54c4e8d141af7643756470ae1acfc8..c333f863fc5b8006e58108c1ba5630d02959d808 100644
--- a/net/base/address_list.h
+++ b/net/base/address_list.h
@@ -27,9 +27,10 @@ class AddressList {
   // canonicalized IP address.
   AddressList(const IPAddressNumber& address, int port, bool canonicalize_name);
 
-  // Adopt the given addrinfo list in place of the existing one if any.  This
-  // hands over responsibility for freeing the addrinfo list to the AddressList
-  // object.
+  // Adopt the given addrinfo list (assumed to have been created by
+  // the system, e.g. returned by getaddrinfo()) in place of the
+  // existing one if any.  This hands over responsibility for freeing
+  // the addrinfo list to the AddressList object.
   void Adopt(struct addrinfo* head);
 
   // Copies the given addrinfo rather than adopting it. If |recursive| is true,