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

net/base/ip_address_unittest.cc

 // 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.
 
 #include "net/base/ip_address.h"
 
 #include <vector>
 
 #include "base/strings/string_number_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 64 matching lines @@
   EXPECT_TRUE(zero_ipv6_address.IsZero());
 
   uint8_t address4[16] = {10};
   IPAddress non_zero_ipv6_address(address4);
   EXPECT_FALSE(non_zero_ipv6_address.IsZero());
 
   IPAddress empty_address;
   EXPECT_FALSE(empty_address.IsZero());
 }
 
+TEST(IPAddressTest, AllZeros) {
+  EXPECT_TRUE(IPAddress::AllZeros(0).empty());
+
+  EXPECT_EQ(3u, IPAddress::AllZeros(3).size());
+  EXPECT_TRUE(IPAddress::AllZeros(3).IsZero());
+
+  EXPECT_EQ("0.0.0.0", IPAddress::IPv4AllZeros().ToString());
+  EXPECT_EQ("::", IPAddress::IPv6AllZeros().ToString());
+}
+
 TEST(IPAddressTest, ToString) {
   uint8_t addr1[4] = {0, 0, 0, 0};
   IPAddress ip_address1(addr1);
   EXPECT_EQ("0.0.0.0", ip_address1.ToString());
 
   uint8_t addr2[4] = {192, 168, 0, 1};
   IPAddress ip_address2(addr2);
   EXPECT_EQ("192.168.0.1", ip_address2.ToString());
 
   uint8_t addr3[16] = {0xFE, 0xDC, 0xBA, 0x98};
@@ skipping 169 matching lines @@
 
   // Prefix is longer than the address.
   uint8_t ipv6_prefix5[] = {42, 0, 20, 80, 64, 12, 12, 9, 0,
                             0,  0, 0,  0,  0,  0,  0,  10};
   EXPECT_FALSE(IPAddressStartsWith(ipv6_address, ipv6_prefix5));
 }
 
 }  // anonymous namespace
 
 }  // namespace net