Add InfoBar delegate for previews

components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h b/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h
index b15bf9c896918c2ce73ae603c17e94c0c09c6bda..dfb1308902de040e67e957baf4197f690b267332 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h
@@ -133,8 +133,8 @@ class DataReductionProxySettings : public DataReductionProxyServiceObserver,
   // the last main frame request.
   bool WasLoFiLoadImageRequestedBefore();
 
-  // Increments the number of times the Lo-Fi snackbar has been shown.
-  void IncrementLoFiSnackbarShown();
+  // Increments the number of times the Lo-Fi UI has been shown.
+  void IncrementLoFiUIShown();
 
   // Sets |lo_fi_load_image_requested_| to true, which means a "Load image"
   // context menu request has been made since the last main frame request.
@@ -300,8 +300,7 @@ class DataReductionProxySettings : public DataReductionProxyServiceObserver,
   bool lo_fi_load_image_requested_;
 
   // The number of requests to reload the page with images from the Lo-Fi
-  // snackbar until Lo-Fi is disabled for the remainder of the
-  // session.
+  // UI until Lo-Fi is disabled for the remainder of the session.
   int lo_fi_user_requests_for_images_per_session_;
 
   // The number of consecutive sessions where Lo-Fi was disabled for