Add a feature to display a persistence toggle for permission prompts on Android.

chrome/browser/permissions/permission_infobar_delegate.cc

Index: chrome/browser/permissions/permission_infobar_delegate.cc
diff --git a/chrome/browser/permissions/permission_infobar_delegate.cc b/chrome/browser/permissions/permission_infobar_delegate.cc
index 0bd24690eb3e68c02463f0c6e3011dfdf577c787..0fc329295a330fb276f22ba9dd91ed666c91d792 100644
--- a/chrome/browser/permissions/permission_infobar_delegate.cc
+++ b/chrome/browser/permissions/permission_infobar_delegate.cc
@@ -4,13 +4,20 @@
 
 #include "chrome/browser/permissions/permission_infobar_delegate.h"
 
+#include "base/feature_list.h"
 #include "chrome/browser/permissions/permission_request.h"
 #include "chrome/browser/permissions/permission_uma_util.h"
+#include "chrome/common/chrome_features.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/infobars/core/infobar.h"
 #include "components/url_formatter/elide_url.h"
 #include "ui/base/l10n/l10n_util.h"
 
+bool PermissionInfobarDelegate::ShouldShowPersistenceToggle() const {
+  return base::FeatureList::IsEnabled(
+      features::kDisplayPersistenceToggleInPermissionPrompts);
+}
+
 PermissionInfobarDelegate::~PermissionInfobarDelegate() {
   if (!action_taken_) {
     PermissionUmaUtil::PermissionIgnored(
@@ -29,12 +36,13 @@ PermissionInfobarDelegate::PermissionInfobarDelegate(
     Profile* profile,
     const base::Callback<void(bool, bool)>& callback)
     : requesting_origin_(requesting_origin),
-      action_taken_(false),
       permission_type_(permission_type),
       content_settings_type_(content_settings_type),
-      user_gesture_(user_gesture),
       profile_(profile),
-      callback_(callback) {}
+      callback_(callback),
+      action_taken_(false),
+      user_gesture_(user_gesture),
+      persist_(true) {}
 
 base::string16 PermissionInfobarDelegate::GetMessageText() const {
   return l10n_util::GetStringFUTF16(