Removes an unnecessary check in FromUntrimmedRawString

We removed the usage of HostForURL() in this function,
IPAddress::AssignedFromIPLiteral() is tolerated to '\0', so there is no
need for this check anymore.

Bug: 1030092
Change-Id: I1f37ff138ad1f06eab2bf82223bf7d567dc73e6e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2057542Reviewed-by: Matt Menke <mmenke@chromium.org>
Commit-Queue: Shimi Zhang <ctzsm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#742262}

net/base/scheme_host_port_matcher_rule.cc

@@ -62,11 +62,6 @@ SchemeHostPortMatcherRule::FromUntrimmedRawString(
   std::string host;
   int port;
   if (ParseHostAndPort(raw, &host, &port)) {
-    // TODO(eroman): HostForURL() below DCHECKs() when |host| contains an
-    // embedded '\0'.
-    if (host.find('\0') != std::string::npos)
-      return nullptr;
-
     IPAddress ip_address;
     if (ip_address.AssignFromIPLiteral(host)) {
       // Instead of -1, 0 is invalid for IPEndPoint.