Move DnsApiTest.DnsResolveIPLiteral and DnsApiTest.DnsResolveHostname to app_shell_browsertests.

extensions/browser/api/socket/socket_api.cc

Index: extensions/browser/api/socket/socket_api.cc
diff --git a/extensions/browser/api/socket/socket_api.cc b/extensions/browser/api/socket/socket_api.cc
index 3225827cb88c39f27c2f608c0e855e9f6b44cd59..1c41ae598ebca93fcf2940797912e533bba74be8 100644
--- a/extensions/browser/api/socket/socket_api.cc
+++ b/extensions/browser/api/socket/socket_api.cc
@@ -96,8 +96,7 @@ bool SocketExtensionWithDnsLookupFunction::PrePrepare() {
 void SocketExtensionWithDnsLookupFunction::StartDnsLookup(
     const std::string& hostname) {
   net::HostResolver* host_resolver =
-      extensions::HostResolverWrapper::GetInstance()->GetHostResolver(
-          resource_context_->GetHostResolver());
+      HostResolverWrapper::GetInstance()->GetHostResolver(resource_context_);
   DCHECK(host_resolver);
 
   // Yes, we are passing zero as the port. There are some interesting but not