Avoid heap allocations in IPAddress

net/quic/platform/impl/quic_ip_address_impl.cc

Index: net/quic/platform/impl/quic_ip_address_impl.cc
diff --git a/net/quic/platform/impl/quic_ip_address_impl.cc b/net/quic/platform/impl/quic_ip_address_impl.cc
index e0c58f14ec87d4601c10b8d955831e48b3ff2f29..961f5f125f495b1b7e97294b318d1b9ffc6297fb 100644
--- a/net/quic/platform/impl/quic_ip_address_impl.cc
+++ b/net/quic/platform/impl/quic_ip_address_impl.cc
@@ -107,9 +107,7 @@ bool QuicIpAddressImpl::FromPackedString(const char* data, size_t length) {
     QUIC_BUG << "Invalid packed IP address of length " << length;
     return false;
   }
-  std::vector<uint8_t> ip(length);
-  memcpy(&ip[0], data, length);
-  ip_address_ = IPAddress(ip);
+  ip_address_ = IPAddress(reinterpret_cast<const uint8_t*>(data), length);
   return true;
 }