Remove calls to deprecated MessageLoop methods on Windows and Linux.

components/sync/tools/testserver/run_sync_testserver.cc

Index: components/sync/tools/testserver/run_sync_testserver.cc
diff --git a/components/sync/tools/testserver/run_sync_testserver.cc b/components/sync/tools/testserver/run_sync_testserver.cc
index 8c80ca0a69322930ef79f0cc99edbe6ae43ca503..b7df94ca5dc295cca332d9bf2c3be15cb3423ac2 100644
--- a/components/sync/tools/testserver/run_sync_testserver.cc
+++ b/components/sync/tools/testserver/run_sync_testserver.cc
@@ -11,6 +11,7 @@
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/process/launch.h"
+#include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/test/test_timeouts.h"
 #include "components/sync/test/local_sync_test_server.h"
@@ -116,6 +117,6 @@ int main(int argc, const char* argv[]) {
   printf("Python sync test server running at %s (type ctrl+c to exit)\n",
          test_server->host_port_pair().ToString().c_str());
 
-  message_loop.Run();
+  base::RunLoop().Run();
   return 0;
 }