AutoFill auxiliary profiles should be off on non-Mac platforms.

chrome/browser/autofill/autofill_manager.cc

Index: chrome/browser/autofill/autofill_manager.cc
diff --git a/chrome/browser/autofill/autofill_manager.cc b/chrome/browser/autofill/autofill_manager.cc
index dbe01d091e57674351a09a37cf7e70500bf22c68..aec30ee76e394198c80f2e2e0a239476c67b1a5e 100644
--- a/chrome/browser/autofill/autofill_manager.cc
+++ b/chrome/browser/autofill/autofill_manager.cc
@@ -88,8 +88,11 @@ void AutoFillManager::RegisterBrowserPrefs(PrefService* prefs) {
 // static
 void AutoFillManager::RegisterUserPrefs(PrefService* prefs) {
   prefs->RegisterBooleanPref(prefs::kAutoFillEnabled, true);
+#if defined(OS_MACOSX)
   prefs->RegisterBooleanPref(prefs::kAutoFillAuxiliaryProfilesEnabled, true);
-
+#else
+  prefs->RegisterBooleanPref(prefs::kAutoFillAuxiliaryProfilesEnabled, false);
+#endif
   prefs->RegisterRealPref(prefs::kAutoFillPositiveUploadRate,
                           kAutoFillPositiveUploadRateDefaultValue);
   prefs->RegisterRealPref(prefs::kAutoFillNegativeUploadRate,