Remove calls to MessageLoop::current() in base.

net/dns/dns_config_service_posix_unittest.cc

Index: net/dns/dns_config_service_posix_unittest.cc
diff --git a/net/dns/dns_config_service_posix_unittest.cc b/net/dns/dns_config_service_posix_unittest.cc
index 88448b16567a4250d3a8af01fc319010c070ddc5..30a3814cde94a04105ee61ab67993cd4e1cd1510 100644
--- a/net/dns/dns_config_service_posix_unittest.cc
+++ b/net/dns/dns_config_service_posix_unittest.cc
@@ -6,6 +6,7 @@
 
 #include "base/cancelable_callback.h"
 #include "base/files/file_util.h"
+#include "base/run_loop.h"
 #include "base/sys_byteorder.h"
 #include "base/test/test_timeouts.h"
 #include "base/threading/platform_thread.h"
@@ -207,7 +208,7 @@ class DnsConfigServicePosixTest : public testing::Test {
   void OnConfigChanged(const DnsConfig& config) {
     EXPECT_TRUE(config.IsValid());
     seen_config_ = true;
-    base::MessageLoop::current()->QuitWhenIdle();
+    run_loop_.QuitWhenIdle();
   }
 
   void WriteMockHostsFile(const char* hosts_string) {
@@ -266,7 +267,7 @@ class DnsConfigServicePosixTest : public testing::Test {
 
   void ExpectChange() {
     EXPECT_FALSE(seen_config_);
-    base::MessageLoop::current()->Run();
+    run_loop_.Run();
     EXPECT_TRUE(seen_config_);
     seen_config_ = false;
   }
@@ -276,6 +277,7 @@ class DnsConfigServicePosixTest : public testing::Test {
   base::FilePath temp_file_;
   std::unique_ptr<DnsConfigServicePosix> service_;
   DnsConfig test_config_;
+  base::RunLoop run_loop_;
 };
 
 TEST_F(DnsConfigServicePosixTest, SeenChangeSinceNetworkChange) {