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

net/base/ip_address.h

 // Copyright (c) 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_BASE_IP_ADDRESS_NET_H_
 #define NET_BASE_IP_ADDRESS_NET_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 77 matching lines @@
 
   // Returns an IPAddress instance representing the 127.0.0.1 address.
   static IPAddress IPv4Localhost();
 
   // Returns an IPAddress instance representing the ::1 address.
   static IPAddress IPv6Localhost();
 
   // 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;
 
  private:
   // IPv4 addresses will have length kIPv4AddressSize, whereas IPv6 address
   // will have length kIPv6AddressSize.
   std::vector<uint8_t> ip_address_;
 
   // This class is copyable and assignable.
@@ skipping 47 matching lines @@
 template <size_t N>
 bool IPAddressStartsWith(const IPAddress& address, const uint8_t (&prefix)[N]) {
   if (address.size() < N)
     return false;
   return std::equal(prefix, prefix + N, address.bytes().begin());
 }
 
 }  // namespace net
 
 #endif  // NET_BASE_IP_ADDRESS_NET_H_