Opt out of download feedback from settings

chrome/browser/safe_browsing/download_feedback_service.h

Index: chrome/browser/safe_browsing/download_feedback_service.h
diff --git a/chrome/browser/safe_browsing/download_feedback_service.h b/chrome/browser/safe_browsing/download_feedback_service.h
index 65a7f1fdaf7e9500a7c677ad24a768319bd25eab..3401977707897d0670410320083ed285fb590a11 100644
--- a/chrome/browser/safe_browsing/download_feedback_service.h
+++ b/chrome/browser/safe_browsing/download_feedback_service.h
@@ -34,6 +34,14 @@ class DownloadFeedback;
 // data for malicious downloads.
 class DownloadFeedbackService : public base::NonThreadSafe {
  public:
+  // Possible values for prefs::kSafeBrowsingDownloadReportingEnabled pref.
+  enum DownloadReportingStatus {
+    kDialogNotYetShown,
+    kDownloadReportingDisabled,
+    kDownloadReportingEnabled,
+    kMaxValue
+  };
+
   DownloadFeedbackService(net::URLRequestContextGetter* request_context_getter,
                           base::TaskRunner* file_task_runner);
   ~DownloadFeedbackService();