Fast-fail WPAD detection.

net/dns/host_resolver_impl_unittest.cc

Index: net/dns/host_resolver_impl_unittest.cc
diff --git a/net/dns/host_resolver_impl_unittest.cc b/net/dns/host_resolver_impl_unittest.cc
index d604b649ad35cd6666b867c3d89b09616886cb58..c61209e5a6107afc36c3e8a59f46df9b6ffc44db 100644
--- a/net/dns/host_resolver_impl_unittest.cc
+++ b/net/dns/host_resolver_impl_unittest.cc
@@ -1519,6 +1519,24 @@ TEST_F(HostResolverImplDnsTest, BypassDnsTask) {
     EXPECT_EQ(OK, requests_[i]->WaitForResult()) << i;
 }
 
+TEST_F(HostResolverImplDnsTest, SystemOnlyBypassesDnsTask) {
+  ChangeDnsConfig(CreateValidDnsConfig());
+
+  proc_->AddRuleForAllFamilies(std::string(), std::string());
+
+  HostResolver::RequestInfo info_native(HostPortPair("ok", 80));

[szym, 2013/09/17 19:24:23]

suggest info_bypass

+  info_native.set_host_resolver_flags(HOST_RESOLVER_SYSTEM_ONLY);
+  EXPECT_EQ(ERR_IO_PENDING, CreateRequest(info_native, MEDIUM)->Resolve());
+
+  HostResolver::RequestInfo info(HostPortPair("ok", 80));
+  EXPECT_EQ(ERR_IO_PENDING, CreateRequest(info, MEDIUM)->Resolve());
+
+  proc_->SignalMultiple(requests_.size());
+
+  EXPECT_EQ(ERR_NAME_NOT_RESOLVED, requests_[0]->WaitForResult());
+  EXPECT_EQ(OK, requests_[1]->WaitForResult());
+}
+
 TEST_F(HostResolverImplDnsTest, DisableDnsClientOnPersistentFailure) {
   ChangeDnsConfig(CreateValidDnsConfig());