Avoid heap allocations in IPAddress

net/cert/internal/name_constraints.cc

Index: net/cert/internal/name_constraints.cc
diff --git a/net/cert/internal/name_constraints.cc b/net/cert/internal/name_constraints.cc
index 0ed685101e9a15d6463ed693188273aed304c5fa..b275a2bce8e0502931eda65ec8fe0f90b176b8d4 100644
--- a/net/cert/internal/name_constraints.cc
+++ b/net/cert/internal/name_constraints.cc
@@ -104,7 +104,8 @@ bool DNSNameMatches(base::StringPiece name,
 
 // Return true if the bitmask |mask| contains only zeros after the first
 // |prefix_length| bits.
-bool IsSuffixZero(const std::vector<uint8_t>& mask, unsigned prefix_length) {
+bool IsSuffixZero(const IPAddress::IPAddressBytes& mask,
+                  unsigned prefix_length) {
   size_t zero_bits = mask.size() * CHAR_BIT - prefix_length;
   size_t zero_bytes = zero_bits / CHAR_BIT;
   std::vector<uint8_t> zeros(zero_bytes, 0);