Remove use_aura build arg.

base/test/test_suite.cc

Index: base/test/test_suite.cc
diff --git a/base/test/test_suite.cc b/base/test/test_suite.cc
index e281cff3da288f8f333f370a9f3a2fc6f668b7a4..b6fb2ef7a362d8e3cf2099bdf1d90e256ac73f3b 100644
--- a/base/test/test_suite.cc
+++ b/base/test/test_suite.cc
@@ -142,12 +142,6 @@ void TestSuite::PreInitialize(bool create_at_exit_manager) {
   testing::GTEST_FLAG(catch_exceptions) = false;
 #endif
   EnableTerminationOnHeapCorruption();
-#if defined(OS_LINUX) && defined(USE_AURA)
-  // When calling native char conversion functions (e.g wrctomb) we need to
-  // have the locale set. In the absence of such a call the "C" locale is the
-  // default. In the gtk code (below) gtk_init() implicitly sets a locale.
-  setlocale(LC_ALL, "");
-#endif  // defined(OS_LINUX) && defined(USE_AURA)
 
   // On Android, AtExitManager is created in
   // testing/android/native_test_wrapper.cc before main() is called.