Change the Lo-Fi snackbar strings for Lo-Fi preview pages

components/data_reduction_proxy/content/browser/content_lofi_ui_service.h

Index: components/data_reduction_proxy/content/browser/content_lofi_ui_service.h
diff --git a/components/data_reduction_proxy/content/browser/content_lofi_ui_service.h b/components/data_reduction_proxy/content/browser/content_lofi_ui_service.h
index c41779baa54e9f2ad99214f79c57b94c3fa03ac6..34757cb3e138536819d198e79c797e885b98196f 100644
--- a/components/data_reduction_proxy/content/browser/content_lofi_ui_service.h
+++ b/components/data_reduction_proxy/content/browser/content_lofi_ui_service.h
@@ -24,8 +24,8 @@ class URLRequest;
 
 namespace data_reduction_proxy {
 
-typedef base::Callback<void(content::WebContents* web_contents)>
-    OnLoFiResponseReceivedCallback;
+typedef base::Callback<void(content::WebContents* web_contents,
+                            bool is_preview)> OnLoFiResponseReceivedCallback;
 
 // Passes notifications to the UI thread that a Lo-Fi response has been
 // received. These notifications may be used to show Lo-Fi UI. This object lives
@@ -38,14 +38,17 @@ class ContentLoFiUIService : public LoFiUIService {
   ~ContentLoFiUIService() override;
 
   // LoFiUIService implementation:
-  void OnLoFiReponseReceived(const net::URLRequest& request) override;
+  void OnLoFiReponseReceived(const net::URLRequest& request,
+                             bool is_preview) override;
 
  private:
   // Using the |render_process_id| and |render_frame_id|, gets the associated
   // WebContents if it exists and runs the
-  // |notify_lofi_response_received_callback_|.
+  // |notify_lofi_response_received_callback_|. |is_preview| indicates whether
+  // the response was a Lo-Fi preview response.
   void OnLoFiResponseReceivedOnUIThread(int render_process_id,
-                                        int render_frame_id);
+                                        int render_frame_id,
+                                        bool is_preview);
 
   // A task runner to post calls to OnLoFiReponseReceivedOnUI on the UI
   // thread.