Update some callers to use more direct ways of constructing IPAddress from well known literals.

net/base/ip_address.h

Index: net/base/ip_address.h
diff --git a/net/base/ip_address.h b/net/base/ip_address.h
index ed76a7630485ce5c16da11fab205c918afdc65b0..f1f244e7fbf5877e06fa87b88d90d8a3107d9509 100644
--- a/net/base/ip_address.h
+++ b/net/base/ip_address.h
@@ -95,6 +95,12 @@ class NET_EXPORT IPAddress {
   // Returns an IPAddress made up of |num_zero_bytes| zeros.
   static IPAddress AllZeros(size_t num_zero_bytes);
 
+  // Returns an IPAddress instance representing the 0.0.0.0 address.
+  static IPAddress IPv4AllZeros();
+
+  // Returns an IPAddress instance representing the :: address.
+  static IPAddress IPv6AllZeros();
+
   bool operator==(const IPAddress& that) const;
   bool operator!=(const IPAddress& that) const;
   bool operator<(const IPAddress& that) const;