Don't autofill credit cards on non-secure pages

ios/chrome/browser/ui/autofill/autofill_client_ios.mm

Index: ios/chrome/browser/ui/autofill/autofill_client_ios.mm
diff --git a/ios/chrome/browser/ui/autofill/autofill_client_ios.mm b/ios/chrome/browser/ui/autofill/autofill_client_ios.mm
index d203e9551401fd4959b74bf39eafdfb1993ac031..6366842518bee94ce3a2ed78dd698686d21d245c 100644
--- a/ios/chrome/browser/ui/autofill/autofill_client_ios.mm
+++ b/ios/chrome/browser/ui/autofill/autofill_client_ios.mm
@@ -152,6 +152,12 @@ scoped_refptr<AutofillWebDataService> AutofillClientIOS::GetDatabase() {
       browser_state_, ServiceAccessType::EXPLICIT_ACCESS);
 }
 
+bool AutofillClientIOS::IsContextSecure(const GURL& form_origin) {
+  // TODO (sigbjorn): Return if the context is secure, not just
+  // the form_origin. See crbug.com/505388
+  return form_origin.SchemeIsCryptographic();
+}
+
 void AutofillClientIOS::OnFirstUserGestureObserved() {
   // TODO(gcasto): [Merge 306796] http://crbug.com/439425 Verify if this method
   // needs a real implementation or not.