Added NetworkInterface::network_prefix

net/dns/address_sorter_posix.cc

Index: net/dns/address_sorter_posix.cc
diff --git a/net/dns/address_sorter_posix.cc b/net/dns/address_sorter_posix.cc
index 8d87774587d8e59a52891ce74994e76bd1c697a9..514a00f8ebf65d8f8b17b35387eee29c8dd6ea4d 100644
--- a/net/dns/address_sorter_posix.cc
+++ b/net/dns/address_sorter_posix.cc
@@ -175,30 +175,6 @@ AddressSorterPosix::PolicyEntry kDefaultIPv4ScopeTable[] = {
   { { }, 0, AddressSorterPosix::SCOPE_GLOBAL },
 };
 
-// Returns number of matching initial bits between the addresses |a1| and |a2|.
-unsigned CommonPrefixLength(const IPAddressNumber& a1,
-                            const IPAddressNumber& a2) {
-  DCHECK_EQ(a1.size(), a2.size());
-  for (size_t i = 0; i < a1.size(); ++i) {
-    unsigned diff = a1[i] ^ a2[i];
-    if (!diff)
-      continue;
-    for (unsigned j = 0; j < CHAR_BIT; ++j) {
-      if (diff & (1 << (CHAR_BIT - 1)))
-        return i * CHAR_BIT + j;
-      diff <<= 1;
-    }
-    NOTREACHED();
-  }
-  return a1.size() * CHAR_BIT;
-}
-
-// Computes the number of leading 1-bits in |mask|.
-unsigned MaskPrefixLength(const IPAddressNumber& mask) {
-  IPAddressNumber all_ones(mask.size(), 0xFF);
-  return CommonPrefixLength(mask, all_ones);
-}
-
 struct DestinationInfo {
   IPAddressNumber address;
   AddressSorterPosix::AddressScope scope;